NEWS

Feature differences from Xiph release

. FLV wrapping for mp3/aac listeners requesting it with ?type=.flv
. define a fixed number of worker threads (default 1) for processing clients
. allow for wildcards (*[] expansion) in mount-name and ban/allow files
. can limit mountpoint by outgoing bandwidth as well as a max listeners count
. can drop new listeners if server-wide bitrate is above a limit
. server xml reload, and reopen logging available via admin url
. When max-listeners reached, a HTTP 302 code can be sent to redirect
  clients to alternative slave hosts.
. authenticated relays, those that match the relay user/pass, bypass the
  max-listener/bandwidth check. slaves can use a different auth to listeners
. mount can filter out theora content, useful for defining a local relay
  of a theora+vorbis stream to have a vorbis only stream from the same source.
. handlers setting for URL authenticator, for N requests at a time.
. allows for using seconds as a measure for the queue/min/burst sizes
. multiple ICY sources on single port

any extra tags are shown in the conf/icecast.xml.dist file

2.4.0.kh22
. auth processing update
  . url engine uses separate timers for the request types.
  . small changes to messaging and timeouts
. fix 404 case from cache starvation.
. fix stats crash bug from source restart.
. Relay restart uses a time marker to allow more error case handling
. range handling updates.
. fix lock bug on file stats
. add listenurl to mount block (generated previously), this is sent to YP.
. trick for safari only (redirect to same url with random code param) to
  workaround a caching issue.
. Allow FLV metadata blocks to resize if excessive tags added.
. worker processing fixes from previous release
. revert various spin locks to mutexes.
. small http processing updates
. log update
  . split locking, allows for more concurrency.
  . level can be the original numbers, names or keywords eg subsec for subseconds
    debug=300, info=100 to keep N lines in that category.
  . extracting info from core file made easier if need arises.
  . missed timestamps in showlog, and timestamps can be in millisecs
  . add level param to showlog to allow just that level up, default is the xml setting
  . add history tag in logs, like display, overridden by possble level settings
. drop the corner images, use css to achieve the same thing without the extra requests
. include a DLL to help the shipped DLLs (eg libcurl) use older windows releases.
. various internal code cleanups.

2.4.0.kh21
. Worker update. introduce 2 queues per worker for client processing, fast and
  normal. fast being used for immediate scheduling. The processing routines no longer
  use the ACTIVE flag but instead report that the client is either done, exiting or
  moved away (eg worker balancing or in auth).
. Changes to internal log code. All messages are currently sent to the log thread,
  but only the appropriate level messages are written. The internal buffer allows for
  seeing all messages from a crash dump. Timestamp expansion to localtime is deferred
  to the log thread.
. XSLT caching update. This splits the processing in 2 stages allowing for better
  concurrency in common cases. admin xsl files also have higher priority.
. Consistency for fallback rating with the previous changes to bitrate specification.
. Fixes for switchover details on priority relays
. Excessive stats for files were getting shown.
. Fix charset bug in non-ogg streams, crept in around kh17
. Fix Flac header processing bug.
. Fix shoutcast-compat setting for backward compatability.
. YP code changed to use param routines.
. Minor rework to windows startup code to show usage in more cases.
. Missing length for admin xml content.
. Fixes to various lockup issues in recent releases.
. Build update. directory rename for windows, autotools update, nsis autogenerated
  from templates. optional build mechanism changed.

2.4.0.kh20
. fix config lock imbalance, causing a lockup effect when write lock wanted ie reload
  or exit.
. enforce http 1.0 when sending requests on relays. Some sites can send chunked transfers
  which do not work with icy metadata.
. minor code changes, larger xslt cachesize, larger number of http response headers from
  relays, pruning unused code.

2.4.0.kh19
. Another update to xml parsing. Allows for cleaner and more flexible handling of
  parameters and tags.
  Added fallback to mirror fallback-mount, so that it reads better in certain cases
  eg <fallback mount="/backup" rate="128k"/>. The other layouts are also handled.
  Empty tags are now ignored, seen with some with intro tags
  original shoutcast port compatability settings handled better.
. Optional feature, set hijack to true on mount to allow a source to kick off the
  existing stream without touching listeners. This is primarily for replacing a
  relay stream as a replacment for fallback handling as it keeps listeners on the
  same mountpoint. While the feature will stay, the exact methos to enable is still
  subject for change but setting this on the mount block is reasonable.
. fix relay intialization failure case.
. relay internal state fix on reload. restart on certain changes.
. range header case fixed. playback issue in browsers
. various code cleanups, possible lockup issues resolved, crash cases, work done
  at shutdown etc.
. reduce some excessive logging in certain cases.

2.4.0.kh18
. Extend http headers work from previous release.
  Can now be used to create POST data. This improves code readability and also
  allows for more flexability.
  Make global http headers work as expected.
- Switchover updates.
  Cleaner handling when switching over the client for a relay or source.
  Interacts with inactive on-demand relays.
. Introduce the linger-on mount setting. On stream exit, the stream goes into a
  state where it stays around running but no feed comes in. This allows for a
  delayed termination if you have relays or sources that drop but reconnect
  but you do not want to keep dropping to fallbacks. During this state, you can
  connect another source so can be used as a switch over between sources.
. Various libcurl interaction updates. tigher control on callback handling
  Handle server shutdown interrupting libcurl requests quicker.
. Trap for HTTP request on shoutcast port and treat it as such.
. Various code cleanups that have been reported.

2.4.0.kh17
. HTTP handling update. A lot of this is internal but the mechanism allows for
  updating http headers from the XML using the http-headers block at the global
  level or per mount point.  The same sort of block can be used within the relay
  for specifying any headers sent to a relay.

. XML parsing updates. This allows for simple tags to be embedded into the parent
  tag.  examples include

  <listen-socket port="8000" />
  <mount mount-name="/stream">
     ...
  </mount>
  <relay local-mount="/stream" on-demand="true">
    <host server="master1" port="8000" mount="/feed-1" />
    <host server="master2" port="9000" mount="/feed-2" />
  </relay>

. Relay hijack capability. Two possible use cases

  - In the multiple host relay situation, every relay-delay seconds, the previously
  failed but higher priority hosts are re-tried and if one works then switches in
  to provide the feed for the stream. listeners are not moved.

  - source client can override relay without moving listeners. This effectively
  shuts down the pulling part of the relay but stays around until the source
  client exits, at which point the relay restarts.  This can be seen as another
  type of fallback, one without the issue of shared fallback mounts causing
  listeners to end up on unexpected mount points. As the listeners stay in one
  place then things like stats are more consistent.

. SSL can be used on relay feed. Use boolean tag ssl or tls on the above host. The
  relay can redirect to https to achieve the same thing.

. priority tag on relay to allow for order host startup different to the order in
  the XML. 1 is highest order, unspecified implies ordered per XML.

. add ignore case for user agent matching.

. priority tag on mount to allow for search order when you can match multiple mount
  blocks (due to wildcard).

. Small update to CORS handling, interaction with http work.
. fnmatch (wildcard handling was broken in windows now fixed) and can use extended
  settings like @ etc
. Minor web page update
. Document updates.

2.4.0.kh16
. Locking updates. Mostly for the config, mount lookup and client processing.
. Add redirect_limit to auth URL options, default 1 but 0-10 allowed.
. If URL Post is too large then avoid the backend request.
. Fix up the slow SSL response on web requests.
. The id flag on killclient command did not handle very large numbers
. Drop the source limit check on relay startup. Did not make much sense.
. Fix some keepalive client issues.
. log reopening fix
. Ogg FLaC header fix
. Various internal code changes.
. update auto* build setup

2.4.0-kh15
. Locking updates. For most, it will be no different but some platforms can be affected
. Keep consistency on the global listener count. Could of shown as very large number.
. Fix issue with fallback override of listeners. listeners being dropped
. Fix broken parameter to on-[dis]connect script on previous release.
. Small update for CORS handling.
. Fix YP updating.  Long standing error flagged up on directory changes.
. Update for listeners moving between workers for load balancing.
. Small update for the FLV-aac wrapping in previous release.
. Fix up range request bug.
. Fix various log related issues.
. Some internal code cleanup

2.4.0-kh14
. Allow for using secs (eg 5s) in queue/min-queue/burst measures.
. Allow multiple icy sources on same port. Just embed in password a mountpoint:pass. The
  shoutcast-mount tag still creates the +1 port and sets a default mountpoint but source
  can override this.
. Fix log issue which could cause a deadlock if on-[dis]connect or auth cmd are used.
. Allow configure to accept ICY_CHARSET to set alternate in build.  The default ICY
  metadata is assumed to be UTF8, but some sites still have issues with setting tags or
  parameters, so allow a different default if they need it.
. Regression on FLV wrapped aac metadata fixed.
. Crash/corruption fix if using stream auth and metadata updates via admin.
. Fix for glibc rwlock priority
. Added the icy-metadata in headers allowed with CORS
. Rework XFF to be earlier, useful in cases where banned IPs apply.
. Allow wildcards in XFF
. Drop the BSD NOPUSH setting for now. Have seen poor performance because of it in
  certain cases
. Openssl API cleanups. eg API differences between versions.
. various small fixes, build and operational.

2.4.0-kh13
. Fix an annoying race case. memory corruption in certain cases that are hard to trigger
  normally but typically involes a listener disconnecting in certain conditions.
. tightened up use-after-free cases with regard to the queue pruning.
. leak fixes with intro via auth.
. Allow seconds to be specified in burst and queue size fields. Just specify the number followed by s
  eg 30s  or 5s. Eventually we could make this the default so that is can apply to various
  bitrates.
. small minor cleanups across the board.

2.4.0-kh12
. fix up some incorrect or stale block cases from previous release for non-ogg streams. Usually
  cause by short write triggers or queue jumps.
. change default charset for non-ogg streams to utf8 instead of latin1, you ca still use
  latin1 either with <charset> mount setting or charset= query param to metadata
. global listeners count could get messed up with fallback to files, also make it a regular
  update stat in-line with other global stats.
. avoid possible crash case on log re-opening, not so common.


2.4.0-kh11
. fix issue with timelimited listeners and html5 players with range requests
. security fix for auth url when allowing certain headers to be passed.
. fix for mpeg block expansion handling, led to cases of parsing failures
. block scaling changes for mpeg based streams.
. internal restructure for metadata on non-ogg streams. For code maintainability.
. bounce admin mount request clients to worker with the source, reduces lock contention with lots of sources

2.4.0-kh10
. stop ID3 in streams for now, some browsers can have playback problems.
. fix memory leak case in the queue from previous release.
. fix crash bug on source timeout
. various internal changes for building, rate calculations

2.4.0-kh9
. pre-roll logging options. like access log but report client details of intros played. Can be
  per-mount or global. Also allow for IP recording to prevent intro play if reconnected within
  N seconds.
. add tag ssl-cafile to refer to a CA bundle other than the default. This way the cert is not
  required to include it.
. allow /admin/metadata to accept param intro or preroll to change the intro file used on a source.
. split explicit mounts from list into a tree for quick lookup. speeds up updating with many mount
  definitions.
. max-listeners setting in limits for server wide limitations.
. worker balancing updates. avoid a lot of bouncing between workers for sources and allow more
  listeners to be attracted to their source worker.
. clean up shutdown procedure for race handling.
. smaller SSL handling cleanup.
. log messaging update.
. mpeg parsing updates. Allows for better detection and reporting, identifies mismatches better,
  and detects a few more frame types. The sync structure is also reduced so should help in caching.
. rate averaging update.
. minor tuning for intro drops, fix for 0- range requests and intros.
. delay opening intro file until stream has started up, allows for format matching.
. lessen write lock scope when reading xml.
. failing to bind a socket at startup should be a termination event, although not on a reload.


2.4.0-kh8

. Logging. An issue was reported on log cycling triggers, should be the last now. This time it
seems to stem from a cycle triggered externally where a new log is created for appending before
doing the reopen.  This is now fixed.

. Expand the worker limiter when processing lots of clients in one pass. This was leading to
some seeing sources not getting cleaned up as the listeners were not getting serviced.  There
is still a cap but is extermely large and can be bypassed on cleanup cases.

. Incoming worker thread added. Normally incoming clients, after passing the initial IP checks
get passed on to worker threads for subsequent pocessing.   This can lead to a lot of wakeup
for the usual worker threads to process these especially if they are short (eg playlist) or
involve filtering or kicking off auth. The extreme case being a DoS type of thing, where the
wakeup often causes the worker to do a big list traversal slowing things down as it gets busy.
This new worker thread deals with the initial aspects, http parsing, initial request handling
and is only moved to the normal workers for sources, listeners and some static content.

. Add "headers" and "header_prefix" options onto auth url. To bring into line with the Xiph
build.  It is possible that some sites would want to inspect certain headers passed by
clients to authenticate. We do not want to pass all of them as that can be large and for such
situations, particular headers are limited, the prime example of these is cookies.  To avoid
POST tag name clashes with existing established tags passed in aurl auth, these headers are
supplied with a prefix, defaulting to "ClientHeader-"

. Stats. A number of global stats are now reported every 10 seconds or the next second if
they have changed.  This reduces load on a stats link and can save on logging if you have
that level enabled.

. A small set of code cleanups

2.4.0-kh7
. fix up recent ssl update to build against openssl 1.1
. drop range requests on streams, was breaking iOS 11.
. log typo fix

2.4.0-kh6
. drop client is read channel is closed off, handles proxies better like AWS.
. Logging
  better log messaging at startup if change owner used.
  fixed race bug generally affecting the per-mount logs, excessive purging.
  fix auto log cyclying
. Add listeners= to POST on auth url. current listener count in the stats
. internal improvement to cached entries for addresses
. SSL updates
  build fix where no SSL is available
  allow for DH/ECDH
  allow for reading the cert before dropping privs, but keep certificate if reload is fails.
  crash fix if no SSL certificate defined.
  small fix for internal openssl threading.


2.4.0-kh5
. use a separate thread for logging, prevents worker stalls in certain setups.
. backward compatibile playlist archive setting fix.
. update IPv6 handling. This is really an internal update but allows for both
  IPv4/IPv6 listening sockets to be created from one listen-socket block. This
  allows for windows builds to have IPv6 as well.
. autodetect SSL connections on incoming sockets. No need for <ssl> in listen-socket
  now but is still there for compatability.
. add <ssl-private-key> in <paths> to allow for combined PEM or for separate SSL
  key/certificate files.
. select https/http URL in autogenerated m3u based on incoming request.
. minor update to windows service creation. No functional change

2.4.0-kh4
. handle really short icy intervals from relayed streams.
. updates for header handling, ranges, auth/html5 etc
. invalidate requests on windows ending with dot, could be used for extension trickery
. have clients stats reported once per second instead of after a change.
. use CORK/PUSH setting if available else fall back to nodelay.
. added so-mss setting to listen-socket.
. missing run-on setting for master now fixed, defaults to 30s.
. auth cmd drops LD_PRELOAD, stdin/out/err and handle errors better.
. various internal code cleanups, boundary checks, log messages
. build updates
  - autofoo mostly from rubenk
  - type cleanups for win64

2.4.0-kh3
. fixes for range handling for certain players like iphone/chrome
. fixes for burst handling with intro playback
. ID3 pushed into the frame parser.
. adjustments to having a wider range of block sizes on non-ogg streams
. adjustments to scheduling of clients.
. added agent to listener remove on url auth
. force SSLv3 off the ciphers.

2.4.0-kh2
. possible global listener count error fixed
. possible crash with FLV and fallback handling fixed
. FLV throttle fixup when dealing with files
. fix up case for requeue on lagging client.
. use throttling thresholds based on bitrate
. scale non-ogg blocks based on bitrate but still enforce a send limit with an
  optional <max-send-size> tag. not usually needed
. implementation of HTTP keep-alive, mainly for web type requests.
. add <redirect-to> tag in <mount>, similar to <redirect> but allows for expansion
  such as ${mount}. the redirect tag is just an alias of this now.
. intro file sending had no burst calculations.
. allow for auth bypass in certain very limited cases, like small range requests used
  by certain clients, or HEAD requests.
. HTTP header cleanups depending on the request, content length etc
. allow for byte accurate drop, this is for range requests for some clients.
. shutdown cleanups, to avoid stalls.
. tidy up xml page error reporting.
. build updates

2.4.0-kh1
. fix for the 'Detected an entity reference loop' message
. header parsing in auth url updated to handle spacing better
. preload default mime types then try to load the mime types file
. fix ssl routines to handle stalls better
. fix issue raised by Klaas Jan, handle blank usernames and encode them to keep the validity of the CLF format.
. cleanup xslt cache/reader processing.
. make PUT the same as SOURCE, handle 100 Continue header
. allow type=.fla as a trigger for FLV wrapping
. user the real/effective/saved user/group calls if available
. prevent worker pipes being passed to exec'd processes, and force FD 0 1 2 to close
. fix header line Content-Disposition
. avoid possible race case in relay removal.
. for ogg feeds, make sure a new block is allocated at the start, else bad parsing could occur.
. use 2.4.x setting for default SSL cipher settings.
. allow for moving a lagging listener to the front of the queue
. send a CORS template for both HEAD and OPTIONS requests, HEAD needs expanding though
. open up the write throttle for unparsed file content
. use original mountpoint in listener disconnection for auth/accesslog selection
. Apply x-forwarded-for to source clients
. treat some failure cases correctly if auth presume innocent setting is in use
. add YP sanity checks for obviously incorrect cases
. various log message cleanups.
. various crash cases fixed.


2.3.3-kh11
. added IP and user agent to POST for mount_add/_remove request
. relay run-on setting added (default 30 seconds). For on-demand relays, this is
  how long the relay will continue with no listeners.
. prevent memory leak with short send xsl requests.
. added message for excessively long duration spent going through a worker client list.
. for cached lists like banned IPs, place wildcards separately to fully specified entries,
  as the matching broke in such cases. The wildcards list now separate from the tree.
. add the nodelay thing back in, normally if doesn't make a difference but in certain
  cases it can affect packet scheduling and cause stalls. Seen on very high bitrates.
. added cipher list tag for compatibility with recent icecast 2.4.x builds
. Add ID3 skipping to file reader. This prevents resync occurring.
. Added CORS headers for html based playback cases.
. pass through unknown metadata on relayed ICY through to the requesting listeners.
. some minor tunings to help large bitrate cases.
. avoid rare case of crash with delayed worker, seen with AIS but substantial delay
  could of caused a race on stats with restarting sources.
. A few tweaks for restarting on-demand relays on failure cases.
. A few bad pointer cases fixed, typically restarting relay stats, hard to trigger.
. added UTF8 check on updated stats routines.
. added content-disposition header for xsl sending non-html content.
. minor changes to YP scheduling/logging.

2.3.3-kh10
. xslt update race fix
. Format
  mpeg parsing can be bypassed if mpeg4 is detected.
  mpeg assumed by default even application/octet for streams only.
  EBML streaming working again.
  Ogg handler was getting stuck with large pages, typically intro via libcurl.
. Auth
  Fix up intro content from auth.
  Presume innocent setting was being ignore if the queue was full.
  Added referer to auth command
. Relay updates.
  uses single structure for all relays, with timestamps. makes better
  handling of startup, shutdown and changes to relays.
  A redirect response handled better, if user/pass returned.
  Queue cleanup on inactive relay, reduce memory use in such cases.
. issue CORS headers, just wildcard for now.
. yp race fixed, make sure yp_currently_playing is not dependent on YP add completing
. stats client bug on initial stats dump fixed
. various internal setting tweaks to trigger events or limit actions.
. various lockup and crash cases fixed.

2.3.3-kh9
. Allow for ${mount} to be specified in dump-file, on-[dis]connect, fallback-mount and
  intro. Useful in cases where a wildcard mount block is used but requires these options
. avoid possible corruption case with FLV listeners and a change in samplerate
. move trigger for override later. when first block added not on initialised
. delay purging of file handles as they could be referenced by inactive mounts for slaves
. fix for outgoing bitrate and global listeners stats not updating in some cases.
. tunings and code re-arrangement to prevent busy loops.
. fix for passed through content.
. prevent possible live lock on sources with limit rate set.
. fix for http parameter parsing
. stats send link improved. Not many use this but could be used by slaves later on
. build fixes

2.3.3-kh8
. Auth remove could be triggered twice if no stream content comes in before time out
. Incorrect content type sent for aac files
. The lag check on the queue could trigger a crash, One case was handled now both are.
. Drop SO_REUSEADDR for win32, can break things over reload.
. Make file requests use normal HTTP response, while streams go through the agent checks.
  It seems that for asx playlists, wmp didn't handle ICY, but requires it for streams
. Fix up the log size setting when using the 2.3 way or doing it. it was being ignored
. Add ID back into per-listener details as some use 2.3.2 pages, typically centova users
. 64bit type clean up.

2.3.3-kh7
. processing certain mpeg intro file could lead to a listener disconnection.
. prevent the '(n' appearing in metadata for mp3/aac streams.
. Avoid listener remove event if source client passes auth but is rejected due to the
  source being in use
. initialise mpeg resync count on first frame found, prevents looping fallback files
  with ID3 or other content from dropping listener after so many times.
. fix relays not overriding listeners from a fallback when starting up.
. introduce lazy slave stats update for updating virtual mountpoints, this reduces 
  the stats generated if you have many mountpoints with frequent starts and stops.
. drop PE substitution in metadata, only do the likes of &amp;
. allow for source queue shrinkage. With the rwlock merging, the queues were left to expand to
  queue-size whether listeners were lagging or not, this helps reduce unwanted parts of the queue.
. allow for listener processing to be skipped if it would stall waiting on lock.
. stats link update, like issuiing NEW commands first at connection before EVENT, not
  important for most people
. Various log message updates and small scale lock range updates.

2.3.3-kh6
. update response header code for returning 200/206. On streams, do not send 206, but
  allow it for file requests.
. migrate some legacy source stats calls to newer API, reduces workload.
. fix some corner cases for queue handling.
. tweaks for response headers for iphone and blackberry
. fix for some cases where listener_remove is not triggered.
. fix for override fallback file through cascade. 
. do not use spin locks on BSD for now, use mutexes.
. mpeg parsing for processing files handled better now.
. fix for handling privileged ports over reload.
. fix for SOCK_CLOEXEC on linux where it is not implemented
. allow for multiple args to be supplied to on-[dis]connect scripts.
. various performance tunings all over, along with a few race fixes and memory leaks 

2.3.3-kh5
. crash fix with intro files. intro reader requires larger buffer

2.3.3-kh4
. burst size of less than 1400 was not handled correctly with recent rwlock changes
. some memory reduction for FLV listeners.
. Missing xsl could cause a busy loop.
. fixed a crash when listener reached end of the queue. Certain assumptions about buffer
  of queue accounting were changed with rwlocks, exposed a crash case.
. on some multi-processor setups, it was possible that certain listeners could trigger
  a busy worker due to old (cached?) data, work around applied.
. A listener that started off a new on-demand relay could be only partially initialised
  a lead to a crash later on
. report of recent flash update on FF15 when requesting non-FLV content. Expected header
  identifying flash is no longer present so now we check for swf in referer.
. Add short write handler for clients requesting short ranges (eg Apple)
. The stats handle for normal file or fallback files were altered in a previous release
  which prevented a lookup of listener details via admin requests. now fixed.
. only move inactive relay client to another worker when there is sufficient difference
. honor auth options "allow_duplicate_users" and "drop_existing_listener" settings for
  webroot files
. proxy cache avoidance headers more generally used.
. minor memory leak on moving clients over fallback.
. code cleanup

2.3.3-kh3
. crash fix with invalid stats handle with fallback to file
. merge Opus module from trunk
. Force NTPL to prefer writers over readers for rwlocks
. bitrate estimation scales better now.
. where possible, use pread to avoid mutex locks on file reads, win32 needs fixing up
. make xsl lookup cache scale better, force a reload via a separate thread to prevent
  worker stalls.
. various tunings for client rescheduling
. small changes to client balancing across workers
. small changes to log messages.
. reference a git hash code is available

2.3.3-kh2
. sent value passed to listener_remove in kh1 could be wrong on 32bit setups
. avoid clearing queue on relay restart, it exposed a crash case with lock changes
. make TCP sockets not pass to on-[dis]connect scripts. useless work avoided
. hijack source fix required with lock changes, to avoid mis-calculated lags drops
. refcount bug missed for sending to master relays. possible memory corruption
. more worker balancing changes, to spread loading more evenly.
. missing delay for blocking file client, has an effect of higher cpu usage
. rare override failure case handled better.
. various minor fixes, including log format, memory leak and stats.

2.3.3-kh1
. Big change with rwlocks replacing mutexes. It's internal but can have a big effect
  on load pattern usage. In cases with many listeners on a single mount we can now
  spread clients across all workers. A number of balancing changes were done to
  assist in localising related clients but may need more tweaking.  A side effect
  of these changes is that queues are only shrunk when there are no listeners, so
  queues can take up more memory than usual but that could of happened before.
. fix bad reference for file-based content like intro/fallback with FLV
. make the minimum duration of an on-demand relay last until it would be classed as
  working, any less then it could be skipped or disabled for a short time.
. skip entity decoding if none required.  For cases where metadata has & causing
  the libxml2 to spit out warnings like "no name".
. If no sockets are opened at the start then exit.
. Win32. standardize on format for date, back to proper timezone numbers
. Log AAC samplerate change in stream.
. Add <inactivity-timeout> in <limits> to stop icecast when there are no sources
. Add <x-forwarded-for> into <paths> for IP substitution from load balancers
. Added referer= to listener_add POST.
. Added sent= to listener_remove POST (bytes)
. sync ebml/webm format parser with 2.3.3, not tried it myself.
. minor tweaks for rescheduling on high bitrate streams, terminating sources, URL
  auth handling if disabled and busy relay restarting.

2.3.2-kh33
. Expand file open limit to match <clients> if possible, warn if less.
. Fix possible client leak. legacy code removal.
. updated mpeg parser to be more specific on bits to match for. It should increase
  the tolerance for changes in the stream format (CRC, samplerate etc).
. reload forces an update of active streams, was missing from a previous update.
. Realplayer based apps fix for aac+. Assumes certain response header.
. drop requirement for matching each / in mount-name.
. content type needed truncating in rare cases before format could be set up
. prevent too much being read in one go when reading ogg data.
. internal change to swapping of hijacked clients, possible crash fix.
. Add timeout for sync mode handling. Should never trigger really.
. fallback over multiple mounts works again
. a few small log reporting changes.

2.3.2-kh32
. Reduce memory copies with large stream lists from master
. internal FLV buffer management cleaned up, possible crash case avoided.
. return 501 instead of 400 for HEAD requests, helps some players.
. stats updating reduced now that relays always have clients, also reduce locking.
. missing user/pass setting for metadata update from shoutcast style source and url auth
. Experimental. send variable block framing if requested by listener
. Experimental. allow <include>/dir/*.xml</include> in <icecast> for breaking xml up
. Experimental. webm work by David Richards
. Experimental.  source client hijacking. replace existing source with another. has to
  to allowed via auth url currently to prevent bouncing of clients with auto-reconnect.
. Add duration to all access, error and playlist logs, allows re-opening them after a
  number of seconds elapsed, 0 by default. set size trigger to 50Meg default.
. possible busy loop in kh31 in cases where fallback is defined
. fix for win32 error reporting and missing uninstall link in programs list
. added "timeout" (default 5) and "on_error_wait" (default 60) to auth url options.
. sync up headers handled by auth cmd with auth url.
. Added missing stream format checks for certain error cases.
. speedup for icy metadata and avoid length bug on inline urls.
. A number of possible lock fixes and checks are now added for odd cases.

2.3.2-kh31
. Add generic scattered IO routines, listeners wanting FLV wrapping now use this which
  saves a lot of memory copying and therefore load.
. build setup for mingw32. This should help with library updates for us, drop GUI build
. relay restarting fixes included for certain error cases. relays are treaated as
  failed if they stop within 60 seconds and skip on to next server if specified.
. a better trigger for on-demand relay if fallback has listeners.
. on reload when changeowner used, allow for listening sockets to be reopend but
  prevent closing priviledged ports unless missing from xml
. prevent unescape routine from creating non-printable chars
. ignore per-mount username when source is using shoutcast protocol.
. URL auth can now accept a "ice-username: ..." in the response headers for setting the
  username. For setups that use query args for auth
. expand args applied to xsl requests, url encoded now.
. modify k and m in bitrates to be on 1000 not 1024
. accesslog modification to parsing, optionally set <type> in <accesslog> to CLF-ESC
  to escape-encode strings instead of using "".
. if falling back to file, the bitrate used takes, in order of priority, incoming
  bitrate, limit-rate and then [value] in filename eg /fallback-[128]
. fix a large ogg page bug, flac is probably the only one showing this up currently
. fix a couple of rare crash cases with file serving clients.
. prevent intro file sending when override triggered.
. make access log report query args on the request, but truncate the strings if too long.
. minor change to send limiter
. move incoming rate limiter to source client specific code.
. Add server-wide redirect tags.
. use per-source stats handles for updates, reduces lookups and avoids taking a
  shared lock.
. minor log message changes.
. fix fallback trigger if source timeout occurs
. fix possible sources count inconsistency with failed relays
. entity expansion in stats conversion routines added
. fixup debug allocation code. not normally used.

2.3.2-kh30
. stats updates.
   Split stats lock into global and source stats locks, reduces contention.
   Updated internal API for using a stats handle for quick lookup when updating
   several stats at once.
   Make metadata_updated stat to be sent last in the initial listing, we would want
   that to appear after title, useful as a trigger for updates.
   make NEW also report the content type after the mountpoint
. re-work metadata insert merge with shoutcast inserts for mp3/aac, do metadata
  followed by stream data instead of the other way around, reduces code.
. fix url decode crash bug with %invalid code.
. prevent yp add if required data is missing.
. allow for all args to be supplied to xsl transforms from request not just mount
. xsl transforms are written direct to refbufs, so should avoid a memory copy on
  each transform, should help in cases of large data sets. 
. Add redirect tag on <mount>
. change default to allow ogg matadata via url (for consistency with trunk).
. have master relays supply auth by default.
. allow for quick responses to be tried and possible close the connection, saves
  rescheduling the worker for just closing the socket.
. streamlist.txt was not getting tried if /admin/streams failed. IE kh slave to a
  2.3.2 master.
. reduce duration of when the config write lock is held when doing reload. 
. a number of tunings for rescheduling clients (source and stats mainly).
. small reworking of client_t creation and accounting.
. missing redirect new listener case not handled.
. source count could get out of sync in certainly failing relay cases.
. a few cases of memory leaks fixed, not commonly used but can accumulate in
  certain setups, eg intros via auth or reloading frequently.
. fix win32 snprintf missing nul char bug
. automatically set nofile and corefile size limits to max allowed, for debug

2.3.2-kh29
. prevent crash with very small burst size (eg 0). 
. fix possible race with relay restart and headers used in stats update
. fix possible mpeg issues causing a crash or getting stuck in an allocation loop on bad input.
. An FLV listener could trigger a corruption in the metadata for non-FLV listeners. More likely
  to occur when starting on-demand relays.
. relays that have only been connected for a few seconds will be treated as if it had failed to
  restart and listeners will be droped or moved.
. fix possible server stall if reload requested and auth listeners were pending on auth queue
. Fix a number of cases where listeners kept a relay from restarting because of an incorrect
  internal state, a stuck relay.
. revert to reserving a new relay source later in client processing. The relay is still installed
  immediately (with client) but the source could clash with another already reserved.
. listener triggers wakeup of inactive on-demand relay, which allows us to reduce the scheduling
  of inactive relay clients.
. when relays are updated, only wakeup workers once, not for each relay.
. stats cleanup on disabled or failed relay start
. on-demand relays minimum transfer set to 2Meg
. make rejected_mount and stream_auth work properly again for URL auth
. possible listener cleanup race if auth used at exit.  We now keep listener on the worker even
  if inactive until complete.
. expanded FLV metadata, double and bool settings, adds audiocodecid, audiosamplerate, stereo and
  various entries from stats.
. slave relay could of been redirected, now it is marked as a slave by the master so bypassess
  various limit checks.
. If auth server does not respond then disable URL requests for listeners for 60 seconds. Keeps
  icecast from clogging up if link to auth server breaks. Some people use auth for non-auth
  accounting or listener intro, so extra option added to allow those by default (option
  presume_innocent set to yes to allow listener even if auth not active).
. Make auth refcount change based on threads holding it not clients, simplifies the shutdown or
  busy startup case.
. move non-ogg metadata update code into one place, and fix-up use of inline URL parsing and
  possible short write in rare cases.
. slow down listener thread (therefore reduce new incoming listeners) if relay starts up, more
  so if many relays start or auth queues are full.
. increase internal settings, max auth handlers to 100, auth queue to 300 and listen queue to 64
. fix ogg stream dump-file.
. reduce frequency of rebalancing across workers with many streams, reduces lock contention
. use alloca instead of malloc for non-ogg metadata/stream merge, minor speedup
. new listeners (with queryargs or user:pass) redirected because of icecast will
  have their supplied auth details added to new location.
. recreate worker pipe if it fails or else we could busy loop.
. add error code to recoverable list for accept, and prevent listener thread slow down in those
  cases, seems to affect FreeBSD more than others although it could affect others.
. revert listener stat names for listclients to 2.3.2 case for now
. minor log message cleanups.

2.3.2-kh28
. fix possible short send shoutcast metadata inserts getting corrupted
. fix a few possible flv issues when metadata is missing.
. add filter routine for mpeg parsing, used for file inputs like intro or fallback
. add mpeg ts frame marker to frame alignment code.
. add min-queue-size mount setting, defaults to burst size so backward compatible.
  players can request anything up to min-queue-setting with the initial-burst
  header or burst= arg
. worker shutdown forces clients to process, should allow for quicker termination
  or moving to another worker.
. stats client tidy up, prevent a few more stats going through to slave, report
  slave auth failure properly, and initialize settings for inc/dec updates
. introduce SYNC flag to source to keep internal counts consistent when moving or
  terminating listeners
. add proxy/cache avoidance headers
. drop start timer from relay as we use the more general client schedule timer
. removed the relay recheck each second as the relays are now installed and started
  via the clients on the workers. saves work with many relays.
. possible crash point on relay details change, or xml reload
. offset in file serving was always 0 even if range was requested.
. add in the 7.xsl hack for compatability
. A few internal code and log message cleanups.

2.3.2-kh27
. use the tree locks instead of stats lock, this should lessen contention with many
  stats updates, typicaly of setups with many streams.
. rework previous non-ogg metadata short-write fix, was not complete.
. previous non-ogg metadata fix exposed problem if file fallback used.
. remove possible race waking up a worker, could result in crash.
. add <max-stream-duration> to <mount> (in seconds), could even be used to cycle
  dump files on a relay.
. leave public setting as-is when on-demand relay stops.
. minor legacy code cleanup

2.3.2-kh26
. fix possible content corruption on shoutcast metadata inserted streams if a short
  send occurs during metadata sending.
. do not list non-hidden streams in /admin/stream[list|streams] and make sure auth
  applies to /admin/streams.
. allow for the so-sndbuf option per-mount as well as on all connections.
. old style bind-address setting (not listen-socket) was not working
. allow a negative ban-client value to use the internal deny block of IPs to prevent
  more than 1 IP connecting at the same time.
. small code changes for main worker thread

2.3.2-kh25
. FLV clients could skip frames on a truncated write, leading to playback problems.
. various client scheduling tunings, allows quicker reschedule when only some data
  was written. This seems to affect win32 more than others, especially with burst
. fix shoutcast-inline metadata bug involving a URL
. per listener mpeg checking only verifies 1 frame as queue is already checked
. set non-ogg intial blocksize to 1400 again, now that blocks can be more flexible
  in size
. filter out multiple / in requests
. the 2.3 log archive setting wasn't handled correctly.
. certain relay configuration (multiple addresses) could leak a file descriptor
  on failure.
. possible NULL pointer crash in metadata update.
. possible sources count not decreased if relay fails.
. fix for possible relay change restart
. worker lock changes, now we only take the lock when adding clients. This reduces
  some lock order complexity when moving clients around and means that no locking
  is done for most of the time.
. relay changes are tagged and changed by the client functions.
. compile cleanups

2.3.2-kh24
. Allow for per-listener wrapping of existing mp3/aac streams when requested with
  a type=.flv as a query arg. The actual trigger could be anything we want but this
  allows for using the existing mountpoint, with easy mapping for URL auth and for
  matching an extension in the player. Works with intro and fallback handling.
. mpeg parser is more complete, handles more cases, avoiding bad input cases
. fix possible bad pointer in ogg headers case.
. fix for shoutcast-style metadata writes being truncated.
. fixes for non-ogg buffer alignment causing resync or stalled streams.
. prevent a failed stream list request from dropping current relays
. handle relay startup shutdown better for memory usage and listeners 
. use Host header if available for buildm3u

2.3.2-kh23
. if an inactive on-demand relay detects listeners on fallback then start relay
  but do not move listeners until the connection is complete.
. fix race condition with restarting non-ogg relays and stats being generated
. make auth queue limit 150 before rejection.
. A number of relay related fixes. these typically occur when a relay is either
  restarted or was removed (eg disappeared from a master).  There is also a
  possible case of long held locking that is now gone.
. add <ban-client>N</ban-client> mount option to add client IP to the internal
  banned list for N seconds. subsequent attempts that have not timed out extend
  the ban period. A stat count of banned entries is produced each second
. reload from admin page was not restarting listen thread if signalfd used.
. increase default queue block size on non-ogg streams to 2900
. mpeg parsing fix for odd cases. This could appear as corrupt or stalled streams
. fix listing of stats and listener details on fallback files
. fix Location header reference from auth url

2.3.2-kh22
. Add mp3/aac sync marker alignment code. This makes the internal buffers contain
  whole frames. allows for better transistion when moving listeners.
. The number of logs is not limited to 25 now
. small changes to client scheduling
. removed format url lock, source lock is always taken, so this is not needed
. Add <skip-accesslog> boolean to per-mount settings. Prevents logging listener
  client details to access log
. evaluate bandwidth usage when adding to the global bitrate, and change throttle
  indicator if max bandwidth specified. listeners have varying degrees of
  scheduling limits applied. lagging listeners get delayed first, then all do.
. fix long standing bug which could cause a crash on a bad xsl.
. report line numbers on xml errors.
. small work-around to handle odd handling of ICY response for mpc and expected
  the content-type header for shoutcast relay and streamtranscoder.
. kh21a. kh20 introduced a bug which could occur with listeners being moved between
  workers.

2.3.2-kh21
. Fix possible stall bug when a source exits and when adding a listener, only
  keep the source_tree lock held until a source lock can be acquired. 
. tighten up where the certain locks are held/released. 
. win32 stat return code fix
. added a few internal checks and some log messages.
. fixes from moo, #1646, status response header first always, #1648, return ICY
  response for mpc
. make fh_node use tree for quick lookup
. zero out format structure, remove previous stats for restarting relays
. NULL pointer fix in cases where a relay was being cleared of listeners without
  a fallback mount, eg being disabled or removed from slave list or reread XML

2.3.2-kh20
. fix possible lock imbalance bug if mutliple workers set
. make sure listeners are not paused if relay is not running
. fix memory leak on each source disconnection.
. fix double free corruption bug if listener_remove used.
. on server shutdown, prevent auth of new listeners only. other auth requests
  can continue which allows client details to clean up properly
. relocate where the source count is increased. For source clients it is just
  before where it used to be but for relays it is increased before a relay
  connection is attempted. Bug in kh19 meant sources kept increasing on relay
  restart
. fix possible stalling bug in auth command method.
. listener_connections stat could have a random data bug
. Do not force a master relay recheck on stream start/stop
. build fix on certain platforms.
. small internal code cleanups.

2.3.2-kh19
. add 7.xsl processing to present stats for a shoutcast /7.html request, requires
  alias of /7.html to /7.xsl
. avl tree of listeners is back in, workers process lists of clients but the tree
  enables a quick listener lookup from a source.
. the admin arg require handler left a lock held if not specified.
. make sure the allow/deny/useragent files reload properly
. initialisation bug for auth, more likely to affect win32 gui.
. content-type has to be lower case for shoutcast to recognise the mime type.
. per-mount access log. <accesslog> <name>/file.log</name> ....
. update to the source shutdown process. reduces code in relay shutdown, no point
  in duplication. allow listeners to be placed in a waiting state if source is
  waiting to start up.
. do not dump stream stats on on-demand relay failure.
. allow for reporting xml parser warnings to stderr at startup
. fix possible auth related corruption with disconnected clients on slow auth
. type fixup on lag calculation on 32bit systems.
. if streamlist fails then drop all slave relays.

2.3.2-kh18
. for people who use ICE_MUTEX_ABORT (environment var) to trap for long held
  locks, change the name to ICE_LOCK_ABORT
. fix possible memory corruption case in stats and threading
. fix vorbis stream bandwidth increase when certain source clients connect
. avoid any ::ffff: in IPs
. YP thread now started from worker as required instead of once per second
. shutdown order and other internal code cleanups
. use signalfd if available for processing signals in connection thread, saves
  waking up the thread.
. make sure the auth mountpoint returned is used instead of the listener
  supplied one. Allows for redirecting listeners to alternative mounts
. update command auth, works in a similar way to url auth now.
. stats clients work better under much heavier load. stats notifications
  are grouped together if possible before sending, this reduces writes in the
  many streams case

2.3.2-kh17
. fix possible memory corruption when using multiple workers
. a few minor timing changes, nothing major.
. fix possible race case in multiple file handle close
. kh16b. fix possible crash case with relay failing
. kh16a. some fserve changes exposed a crash bug with flash clients.

2.3.2-kh16
. you can now fallback to file if the initial mountpont is not available as long
  as there is a limit-rate set at some point within the fallback chain.
. A header from url listener add "icecast-auth-user: withintro" indicates that
  the response contains intro data to be sent to the this listener. Anything
  else indicates the previous behaviour.
. allow source clients to be limited by duration, set by time limit header in
  url stream auth
. internal changes to average bitrate calculations. blocks are now removed based
  on the timestamp not the block count.
. fix possible race with url auth'd listener getting a 404 response
. try throttle file sending based on duration/bytes sent on file handle and split the
  file sending function into two (throttled/unthrottled). reduces memory.
. merge in compile-time allocation counters
. Added some stats for fallback files, and metadata_updated for sources
. minor cleanups for internal API. log message cleanups.
. kh15b. fix possible crash on url listener failing.
. kh15a
  - fix memory corruption when clients are referring to the same file.
  - log buffering on win32 enabled

2.3.2-kh15
. lock mismatch identified, could cause a stall in the worker.
. relay connection timeout was not being set in all cases
. Don't fallback listeners on relay fail if server shutting down
. minor code cleanups.

2.3.2-kh14
. Allow stats/listclients/killclient work with file references
. Add timeout parameter to relay. number of seconds for connect to complete.
. fixes for restarting of relays, especially where changes are detected and
  where fallback to files were set.
. repeat fallback file
. tuneup client scheduling for file sending
. added a few validation checks, useragent chars, xml config port ranges
. log message cleanups.

2.3.2-kh13
. on source exit, listeners do not need to be moved to the file serving engine,
  just release any shared data and delete client if not on worker. saves process
  work at source exit
. fix possible crash bug with long lock held detection.
. allow listener_add response to include intro content
. merge connection_t into client_t, and shrunk connection_t, reduces memory used
. improve some of the internal client scheduling.
. the reading of the mime types file was done too early
. admin/fallback now updates the mount details if available.
. more source lock cleanups. nothing major
. change the order of the header routines, the format specific routine now calls
  the general routine.

2.3.2-kh12
. xml based relays could cause a crash on server exit or xml reload
. avoid memory/fd leak on active relay restart.
. cleaner worker thread shutdown.
. win32 update. Prevent Esc closing the GUI. Make the service work better and
  is now able to take an alternative xml as parameter. Update libogg in the
  build to 1.1.4 and refer to the current directory for dependent DLLs.

2.3.2-kh11
. busy looping caused by truncation on 32bit setups
. avoid possible deadlock between file release and open
. relay client handles were not being cleaned up fully.
. send Host: header on relay connects.

2.3.2-kh10
. big internal thread change. instead of one thread per stream, we now have a fixed number
  of worker threads, each processing a set of clients (sources/relays/listeners etc).
  - no source or fserve threads now. auth still has thread(s) as the API for libcurl
    is blocking
  - worker threads with no clients sleep for long durations.
  - defaults to 1 worker thread, overridden by <workers> in <limits>
  - listeners get moved to the worker thread running the source, helps caching
  - sources get moved to a less busy thread if it would help
  - each client has a timestamp to indicate when it wants service. The sleep duration
    for the worker is based on the next client to be serviced.
. if fallback to file is specified and the requested mount is not active then a 404
  response is returned instead of the file contents.
. fserve engine can handle bandwidth limiting per client. Fallback to file uses this
  by using the average incoming bitrate of the source stream as the target limit.
. file serving uses an internal cache of open files, so that 1000 listerners do not
  suddenly open 1000 files if a fallback to file occurs.
. move listeners admin request can specify another source or file.
. relay changes
  - the client structure is always allocated now, instead of when the relay is started.
  - listeners stay on relay if switching to another relay master. Only when they all
    have failed does the fallback apply.
. post-kh9 fixes
  - fix for possible race with rejected new listeners going through auth
  - make mp3-metadata-interval 0 work again
  - auth htpasswd checks for details provided like user:pass@host:port/mount and if not
    then checks as host:port/mount?user=a&pass=b

2.3.2-kh9
. allow shoutcast source client auth work via stream_auth url
. allow for a flash policy file.
. internal cleanup to help merging into trunk
. fix vorbis metadata update via url, broken in recent releases. cleanup some metadata
  updating/logging
. drop vorbis stream rebuilding back to flush evert half second, in sync with trunk
. stop false reports of 'not null' in debug logging. no other effect on server
. limit how often the relay mountpoint "already exists" logs.
. minor tweaking to the average bitrate calculation
. remove the internal global time caching, although prevent several time calls if in
  succession.

2.3.2-kh8
. fix memory corruption which affected ogg streams.
. fix for unsupported FBSD/win32 spin locking options. abort on initialisation failure.
. win32 fix from kh7 causing stalling source threads. fallout from kh7 build failure

2.3.2-kh7
. merge fix for bug report on trunk for skeleton
. fix for build failure with recent glibc
. fix for admin.cgi metdata updates not applying (kh5 bug).
. minor locking cleanup
. win32 fixes. server restart could cause relay details to become corrupted
. win32 update. updated libxml2/libxslt

2.3.2-kh6
. some source stats were not being reported on the xsl pages.
. win32 access log timestamps should now to correct.

2.3.2-kh5
. stats fixes, crash case in stats handling, and hidden attribute was not honoured
  on xsl pages with recent stats changes.
. if requesting /admin/streams via stats method then allow auth via relay user/pass
  or mountpoint auth. receives only stats for slaves
. allow url= tag on metadata update for non-ogg streams, adds StreamUrl.
. fixed possible crash with skeleton stream handling
. actually prevent metadata updates if there is a stream already running from a
  different IP.
. fix build bug on FBSD7
. allow optional queue-len tag in listen-socket, default is 10

2.3.2-kh4
. Where's the brown paper bag. boolean settings in the xml were being ignored due
  to an incorrect test. 

2.3.2-kh3
. fixed master not informing slaves of streams bug. caused by missed setting in
  the kh2 stats update
. more xml checks for badly formed xml files.
. log files can now be sections not just a single filename ie <errorlog> can
  contain <name> <archive> <display> and <level>, accesslog can contain <name>
  <ip> and <archive>, playlistlog can contain <name> <archive> <display>. In each
  case, name is a filename, archive is a true/false setting for using timestamps
  on a reopened file, display is the number of lines to show in the admin page.

2.3.2-kh2
. more stats work. Clients are now processed as needed instead of a dedicated
  thread per stats client. 
. don't allow raw metadata updates if not from the same IP address as the source
  client unless it is from the admin user. For some reason some source client
  issue updates even though they are rejected.
. missing lock on streamlist master/slave update, could cause memory corruption.
. update to average bitrate handling.
. allow strftime expansion on dump filename, applies at the time the stream has
  started
. removed debian directory, it's not maintained really so leave it to the debian
  people to deal with it themselves.
. experimental theora keyframe as png patch added. not built by default
. minor memory leak plugged in fserve

2.3.2-kh1
. remove stats thread. Stats clients still have their own thread and queue.
. fix low bandwidth theora stream problem.
. failing on-demand relays were not being recovered as they should of.
. encode xml entity data for clients useragent/username
. reduce memory usage in avl nodes, seems to benefit win32 more because of the
  unused lock handling
. minor patch for kate detection applied. ogg.k.ogg.k
. minor type cleanup for off_t in fserve

2.3-kh34
. Added Kate/Skeleton codec handling within Ogg streams. patch by ogg.k.ogg.k
. small changes for stream directory handling, mostly for error cases. 
. added /admin/reset?mount=/mountpoint&setting=x to reset stats for that mountpoint.
  without setting= all resetable stats are reset. x can specify peak,read or send
  or a combination of them (comma deliminated)
. /admin/streamlist.txt uses the same routine as /admin/streams so does not have 
  a limit on how much is sent back.
. updated win32 code, windows service should be ok again. service name now
  includes version to help multiple installs but windows may require a reboot
  between removing a service and installing that same service again.
. fix possible crash on reload of xml with bad tags
. small update of web pages
. added per-mount stat for total mbytes sent

2.3-kh33
. master/slave update.
  slave mode only issues a streamlist.txt request if the /admin/streams request
  fails.  /admin/streams also acts as an mountpoint for the slave relays by
  passing a mount= arg and auth.
  You can now define a <mount> for /admin/streams to define how slave
  authentication is done eg url (listener_add) or htpasswd.
  Once authenticated, the slave can bypass any limits like max listeners etc.
  The slave also allows for defining a <master> tag block instead of <master-*>
  tags allowed are <username> <password> <server> <port> <redirect> <bind>
  auth url can take an "icecast-slave: 1" header, which makes client act as a
  slave and bypass mount limits.
. build fixups for OpenBSD and cases where IPV6_V6ONLY is missing
. move 'clients' limit check to after admin request check, means admin commands
  can work even if the limit is reached. removes a lock taken as well.
. drop connections to known slave relays if we find that the destination source
  is a fallback to file, as this would cause high bandwidth usage.
. stats fix for inactive on-demand relay stats without a mount definition.
. added some minor consistency checks.

2.3-kh32
. crash fix for a failing on-demand relay.
. incorrect logfile settings for timestamp setting, for playlist and access.log
. update for win32 build and initialization.

2.3-kh31
. hard to trigger but possible race condition on source startup.
. long standing bug identified with many descriptors (eg > 1024 listeners)
. allow YP thread to skip a non-responsive server.

2.3-kh30
. crash fix if no user/pass supplied when stream_auth in use.
. the admin=1 was not passed in POST for stream_auth on metadata updates

2.3-kh29
. some small code re-organisation in kh28 caused auth htpasswd to fail new
listeners
. work around FBSD issue with listening on IPv4/IPv6 sockets

2.3-kh28
. race fix in yp thread startup.
. manageauth userlist page was blank due to a NULL check, fixed.
. add rejected_mount auth option to redirect unathenticated listeners to an
  alternative mountpoint. eg subscription stream redirected to low bitrate
. Allow for url auth to handle 'Mountpoint: ' header for redirecting listeners
  if they are to be rejected to an alternative mountpoint on the same server.
  This is as opposed to the Location: header which gets a player to redirect,
  maybe to an alternative server.

2.3-kh27
. fix potential fserve thread race
. merge listener inline shoutcast metadata into previous block write. It is
  very common and saves writing a very short packet per listener at metadata.
. reduce log memory usage when caching lines for web display
. reduce memory usage slightly on 64bit systems, in refbuf/avl storage
. be more 32/64bit clean
. fix possible corruption if reducing qblock size over reload
. get stats thread to update global outgoing_kbitrate stat, no point flooding
  the stats queue.

2.3-kh26
. internal code cleanups
. fixed accidental bug which caused problems for non-ogg streams without a
  mount defined
. if listener_remove used then remove queue reference before auth performed as
  queue will expand. race case between auth and source thread on refcounting.
. Add error reporting with above case, makes identification easier.

2.3-kh25
. kh24 had a lockup bug on reload if auth url used.
. Don't pass listeners to the authentication queue if no auth handler defined
. auth listener_remove was not triggering if listener_add was not specified.
. make sure avl tree for mime types is cleared.
. remove pthread_exit in fserve, older glibc had a memory leak
. fix memory leak/corruption in YP handler, also make YP thread startup instead
  of polling frequently.
. redo server connection lookup. Now we refcount the server connection details
  from the xml, make the client refer to it. reduces locking as well 
. always call the xml reload from the slave thread.
. fix memory leak over reload, when using multiple master within relay
. incorrect output appended to streamlist output for relays.
. race between stream shutdown and listener_remove could cause memory corruption
  with queue buffers. Make source clear less strict.
. cleanup any fserve clients after other threads are down, removes lock race
. reduce burst limiter for listeners on sources.
. if available, log file descriptor limit allowed by kernel.

2.3-kh24
. make auth threads start/stop dynamically. reduces latency for auth'd listeners.
  The handlers setting is still the maximum number of threads for that auth
. ip allow/deny list wasn't working right due to fnmatch return value.
. fix memory leak which occured on reload events.
. fix possible corruption when connection thread restarts from reload
. add <deny-agents> tag in <paths>. Drops listeners with useragents matching the
  pattern in the specified file.
. internal code cleanups

2.3-kh23
. file serve thread is dynamically started/stopped, latency seems much better when
  compared to a sleep/polling loop
. sometimes the empty virtual mountpoint stats were being provided instead of the
  real source stats. This should finish off some of the work done earlier on stats
. Don't be case sensitive on range header in fserve parsing.
. a typo in the POST for listener_remove got by, ip and duration were not correct.
. small code cleanups from merges with trunk
. minor fix for global listeners count
. listener remove wasn't being triggered for listeners on sources.

2.3-kh22
. Implement a global outgoing_kbitrate stat, sum of all listeners on all sources.
. Small updates on the average bitrate handling
. implement a server-wide bandwidth limiter check for new listeners. If <max-bandwidth>
  in <limits> is defined then new listeners can be rejected/redirected.
. drop non-gcc compiler flags from configure.in, drop _XOPEN_SOURCE as well
. send Cache control header, just in case proxies are involved
. another flash (on IE as well) hack posted on forum.

2.3-kh21
. IP ban/allow files can now use wildcard expansion to matching addresses
. allow mount= param on webroot xsl pages
. check for missing type in mount authentcation
. fix corruption if listen socket failed.
. if using a change owner setup, do the listener socket setup early (for root privs)
  and prevent reload from altering the sockets.
. lag calculation incorrect on shoutcast style metadata inserts, fixed
. fix potential lock held in admin for certain error cases

2.3-kh20
. send http 302 response if auth url returns a location: header 
. allow for any number of listen-sockets
. combine listener/connection thread into one thread
. use short timeout period in connection thread if requests are pending
. make primary thread be the slave thread which starts the connection thread, this
  allows for the connection thread to be restarted with changes to listening sockets
. cleanup work from merging to trunk

2.3-kh19
. fix segv possibility in mp3 metadata
. in xml stats, make listeners id to be an attribute of <listener>
. cleanups from merge to trunk work.
. added per listener lag count, which shows in stats.
. added ip= in POST for listener_remove
. Use spin locks (if available) for a few short held locks, falls back to mutexes.
. missed some socket setup with the ipv4/ipv6 code. You don't have to wait when
  restarting servers

2.3-kh18
. fix a segv case that occurs in a certain fallback mount case, this was introduced
  recently when max listeners/bandwidth was worked on.
. fix possible crash case for a missing mime types file
. fix segv case added in kh16, on demand relays without a mount.
. win32 build should now handle wildcard mountpoints.

2.3-kh17
. fix segv issue in auth, has been triggered with htpasswd
. if inactive mounts with active fallbacks are removed from the xml, they will
  now be removed from stats.
. small build fix for ipv6 update in kh16.
. memory leak fix in relay handling and mime types, 2 other minor ones elsewhere
. do http auth extraction for incoming clients earlier, username wasn't logging in
  certain cases.
. mangeauth was not hooked into correctly from the last admin update.
. change streamlist trigger to be based on time instead of a counter. With the
  shorter delay in slave, this was causing the streamlist to occur too often.
. http 302 wasn't sent 100% of the time. The redirection list is now only dropped
  over XML reload.

2.3-kh16
. Implement max-bandwidth mount setting, this can be used to limit listener numbers
  instead of/as well as the max-listeners option.
. Add patch from Gilou for source address bind for relays. Adds <bind> option to
  <relay> and <master-bind> option for slave setups.
. Update to IPv6 handling in net/ code, no need to seperately specify an IPv6
  socket for listening.
. Actually make the listener details appear on the stats pages if the mount is
  specified (does not apply to listclients). Most won't notice this unless they
  parse those xml stats for listener information.
. Handle xspf generation like m3u but uses an xsl page for layout
. Small changes in a few places, avg bitrate calculations, lower triggers for
  listener send with fallback files.
. Internal duplication removed, source structures contained limits which were also
  held within mount structures.

2.3-kh15
. fix for possible race (from kh14) leading to lockup when many streams are
  starting up at the same time.
. don't provided listener details to all streams via admin access, only when
  a mountpoint is provided. Should help in cases where there's large number
  of listeners on several streams

2.3-kh14
. add <file-seekable> boolean to <mount>, default is true
. return 403 (not 401) response if the server in auth url is not contactable
  for new listeners
. increase scope for source locks, certain initialisations can have race
  conditions which leads to unpredictable results.
. minor fix for listclient.xsl, the case of listener stat names were changed.
. minor cleanup of stats updating

2.3-kh13
. Allow for wildcard matching (eg /*.mp3) in mount definitions on systems that
  support it.
. for streamlist (slave requests), get the list of non-hidden streams from the
  stats instead of the source or mount lists. This allows for streams without
  a <mount> to be exported and also lists inactive mountpoints with active
  fallbacks.
. Allow for specifying an id= parameter with listclients so that specific
  listener details can be queried.
. ship a config.h used for a VC6 build in win32

2.3-kh12
. relays handle 302 redirection from master server.
. fix for possible crash with incoming shoutcast style source clients.
. changes to web/admin pages. while /status.xsl still exists, better to refer
  to /index.html for web and /admin.html for admin.
. Filled in a few more global static stats, updated on reload xml

2.3-kh11
. added extra header for shoutcast source clients. some may need it.
. missed <server> tag in <relay> <master> from previous release
. changes to admin interface, aliases now work, reduce code size.
. relay page shows all relay masters, not just the first one.

2.3-kh10
. race fix for relays, hard to trigger but can cause a crash
. add <mimetypes> xml tag for locating file with mime types defined
. added warning messages for xml tags with no content, but don't prevent
  icecast from starting.

2.3-kh9
. try a lower content length value for flash clients, some combinations of
  browsers still have issues.
. add <admin_metadata_only> (boolean) to <mount> for ignoring incoming vorbis
  comments. Only takes the artist= and title= settings from /admin eg
  /admin/metadata?artist=abc&title=xyz&mount=%2Flive.ogg
. allow multiple <master> tags in <relay>, allows for switching between multiple
  masters. Requires a fallback to keep listeners connected over switch though.
. add <retry-delay> setting for <relay>, default is <master-update-interval>
. Add <allow-ip> setting. similar to banfile but only allow connections from
  certain IPs
. fix on win32 previous build, truncation bug reappeared on large web requests.
. minor build update for acx_pthread
. assume default pass-through (mp3/aac etc) stream charset ISO8859-1 not utf8
. added macro which enables the writing of large files (log/dump).

2.3-kh8a
. build had access log logging without IPs

2.3-kh8
. add "handlers" option for url auth, defines multiple auth threads for
  processing incoming clients. Default is 1 per <authenication type="url">.
  Internally the client data doesn't hold onto the auth_t now.
. banfile option, drops connections whose IP is listed in the banfile
. Added check for a still connected listener before auth attempted, no point
  in doing slow url auth if listener has already disconnected.
. fix buildm3u for auth without a source stream.
. change content-length for flash to 319324133 to see if that works better
  for IE7
. Added <accesslog_ip> boolean for runtime config of logging IPs, default on
. expand on relay failures messages to include the server and mountpoint
. fix possible race condition with shoutcast style connections.
. decrease frequency of connection thread wakeup.
. make connection thread sleep if accept fails, prevents busy loop
. Don't set CURLOPT_PASSWDFUNCTION if libcurl does not define it
. update debian directory (need feedback on that)

2.3-kh7
. fix slow memory leak on metadata updates if <charset> was defined
. fix minor leak on xml settings.
. fix segv on 0-value duration in source, minimum is 2 secs (default 60)
. fix small memory leak on xsl page requests.
. stats update. kbytes used, and frequency of read kbytes reduced.
. change vorbis stream rebuilding to flush at 1 sec at the most.
. minor changes to win32, buffer size issues for stats and xml cleanup
  causes a crash in libxml2
. minor log updates

2.3-kh6
. implement <limit-rate> bps in <mount>, the bitrate which triggers a timer for
  possible source termination, also causes a slow down in reading. default no
  limit applied.
. implement <avg-bitrate-duration>, calculate average bitrate of over so many
  seconds (default 60)
. add <wait-time> to indicate how long a mountpoint is reserved for after a
  source client terminates.
. some internal cleanups
. stats value cleanups.
. possible segv on override case if source is slow to start streaming.
. hardcoded AAC content type missing
. initial xml setting bug, caused crash with later glibc.
. streamlist.txt should list inactive mounts if their hidden fallback is active.
. move listener_connection increases even later so that listeners on failed
  on-demand relays don't get counted.
. updates to charset handler, for failure cases
. kh5a included a fix for a segv that crept in.

2.3-kh5
. add media-type to xsl pages, IE has trouble with xhtml
. add <accesslog-exclude-ext> for defining extensions that do not get reported
  via the web interface (they are still written in the log file). Whether
  alternative tags should be used is still undertermined.
. fix for empty log display via xsl, produced odd chars.
. auth url avoids calling backend code when settings are not defined.
. content type fixes for xslt files
. allow <shoutcast-mount> to appear in <listen-socket>, this defines a per-port
  based mountpoint allowing multiple shoutcast source clients to connect. This
  also defines a port+1 listen-socket automatically.
. xml parsing changed, 'yes' and 'true' can be taken for boolean settings. some
  removal of deprecated tags but may of missed a tag so report if any are.
. added <filter-theora> boolean for <mount>, filters theora out of passed stream
  so listener only gets what is left.
. add per-mount listener_connections stat
. add <allow-url-ogg-metadata> bool per-mount, enable to allow url based metadata
  updates. Default disabled.
. add charset option to mount options. It allows for conversion to UTF8
  for the stats/web pages and therefore YP listings and playlist log.
. minor changes to web pages.
. allow for 403 response from auth url to pass back to listener, in the case of
  a 200 response from auth server, allow 403 at start of message to indicate a
  403 response to listener.

2.3-kh4
. fserve thread now looks for a chain of refbufs as well.
. plug leaks from coverity code analysis. mainly minor but a possible fd leak.
. log handles caching of N lines.
. show last N lines of log contents via admin pages
. change webpages (for the better!), add logs display and reload config.
. use 64bit handling when using stats _add calls
. send 403 not 404 for max listeners reached.
. add server-wide total sent in streams count. 
. fix possible corruption case with new cients.
. on listener move, search from burst point if most recent refbuf is not a sync
  point, currently only theora streams.

2.3-kh3
. add source auth via authenticator, affects certain admin access as well.
  Only url auth using it currently
. relays now have start timestamps, prevents a possible constant rescanning
  effect with multiple relay failure case
. fix memory leak in ogg flac case.
. update YP, get bitrate from stats (incoming_bitrate), if not provided. Issue
  yp add after 60 secs, gives time for bitrates to settle.
. cleanups in auth setup, push more setup code into the core auth handler.
. when moving listeners, if most recent refbuf is not a sync point then use
  burst point. Fallback theora streams can be affected by this.
. drop master-redirect-port, use <port>.
. set <master-redirect> (in slave) non-zero to send IP/port details in
  streamlist request, so that new listener redirection from master is possible.
. set <max-redirect-slaves> (in master) to specify the number of slave servers
  that can request listener redirection, default 0.
. prevent avg/total byte stats for fallback to file sources.
. allow for server id to be defined in xml.
. add connected stat to source, duration in seconds.
. increase average stats for bitrate calculation to 30 seconds
. increase sleep duration in connection thread to 100ms
. make source clients report read bytes in access.log
. bypass clients limit check for ssl connections, let admin do stuff
. various type cleanups, gcc4 show various signed/unsigned issues.
. sync up with trunk, win32, os.h/compat.h, minor type definitions

2.3-kh2
. merges from post 2.3 release/feedback
  - stats speedup, from order O(n^2) to O(1)
  - log cycle update. can state log size and whether renaming with date extension
    is to be done
  - fixup grnaulepos handling in vorbis rebuild. minor audio playback glitch
  - sync intro file change over HUP handling.
  - send 403 responses instead of 404 in certain cases.
. added realm and drop_existing_listener settings to generic auth.
. auth url didn't handle authetication of the invoked scripts. Now the order
  we handle auth is
  - url as   http://user:pass@.../
  - take auth from options username and password
  - if listener_add/remove then use username/password from listener
. fix double free bug in auth

2.3-kh1
. fix double buffer release when dropping auth'd listeners on source exit
. don't put client on auth engine if removeurl is not set
. update xsl pages.
. fixup nsv source clients (shoutcast style), nsvcap uses \r\r\n
. added logsize tag, for automatic move/reopen of logs
. fix race on new listener connection
. missed lock when relay allocates a client
. nul char out by 1 position in initial connection buffer (request)
. slow down accept thread if client limit reached
. cleaned up access logging, username is logged if present
. add icy:// hack for quicktime
. if host header is missing a port then assume it's broken (eg winamp) so
  treat as if it wasn't there
. revert parser handling as it was having issues with fallbackl to file

2.2-kh17
. fix double free bug with failed startup of relay
. added per-mount max-listener-duration setting.
. updated auth_url, POST update and option names
. log xml/xsl errors via error log
. fix hopefully last oddcast/connection thread related bug
. added artwork=url to metadata update 
. updated docs (some sync-up with trunk)
. max client limiter updated
. sync with trunk
  - pidfile created before changeowner
  - close stdin/out/err if using -b 
  - win32 free bug, unix doesn't seem affected
  - htpasswd segv bug when auth file is missing
  - auth.xsl fixup
  - mp3 metadata cleanup

2.2-kh16
. fixed segv when using oddcast DSP
. master/slave streamlist is now isolated in its own thread, so should not
  affect the slave thread which among other things does timer updates. libcurl
  is used so that is required but you can do ssl queries if required
. new listeners will be rejected if auth queue is backed up
. Changes to web pages by Dave St John
. isolated SSL/non-SSL switch to connection_t
. An older xslt lib can be used (earliest version has not been determined yet)
. changed 'header' option to 'auth_header' option in auth_url
. various typos, cleanups for merges with trunk

2.2-kh15
. fixed 2 segv bugs, one on relay shutdown (on-demand) and another on client
  drop in connection thread.
. send the fixed string responses via fserve, unlikely to show as a problem
  for normal connections but required for SSL sockets.
. Added SSL handling on certain ports define with <ssl>, initial work by
  oddsock, extended due to connection handler changes.
. merge small changes from trunk to keep things in sync
. increased the max number of listen sockets to 50

2.2-kh14
. various auth updates. The auth thread main code handling updated.
  - auth url, various checks added for missing settings, listener timelimit
  added. Added port to POST and useragent (icecast version). 
  - auth_htpasswd, uses avl tree to store users, faster compared to disk 
  and mtime is used to make sure it's in sync.
. win32 updates, probably more cleanups needed but file references are correct
  again.
. some small memory leaks plugged and typos fixed.
. added the favicon.ico file from the website

2.2-kh13
. updates the m4 scripts, pthread for solaris/gcc and check for --with-X
. the ogg reading code could busy loop in certain cases, fixed
. limit ogg codecs per stream to 10 so that it has some upper bound and not a
  potential excessive memory taker.
. always on relays missed out the listener count initially, fixed
. compiler cleanps.
. YP sends server client limit if max_listeners is set, however client_limit
  is not in the stats tree, should it be?
. oddcast sends stream data with http headers, which caused the non-blocking
  connection thread to drop the inital bit of the stream, ie ogg header.
. fix xslt handling properly, buffer truncation was missing and empty string
  was leaving the socket open.
. fixup handling for shoutcast source clients that send a \n for EOL
. only log to access log if a response code is set

2.2-kh12
. rework connection handler to work on non-blocking sockets. the listener thread
  handles the http reading, after which it passes it over to the connection
  thread for parsing.
. any xsl file can be placed in admin now and can work off the stats data
. dump listener details to xml for admin requests that get the stats tree
. make sure that fallback file streams are hidden
. fix fd leak in error case for file ranges and plaintext list_mounts function
  like that used for querying a master server
. use correct offset from burst point for new clients
. batch up small reads for passthrough streams into slightly larger blocks, so
  that TCP protocol overhead is kept to a minimum.
. because of the batching, the max send count per client per iteration is less
. fixup streamlist.txt to be sent via fserve thread
. fixup automatic m3u output to be via fserve thread.
. XML read from HUP is not sent via the connection handler now, instead the
  slave thread processes it
. doc update for url listener auth

2.2-kh11
. xsl/xml pages from adminroot and webroot are now delivered via the file
  serve thread.
. Allow TouchFreq changes for actions other than add
. update main auth handler, don't require user:pass to be passed, leave it to
  the specific auth to decide.
. update auth_url, pass original request url through to auth in mount=
. plug some small memory leaks in auth engine
. remove some dead code

2.2-kh10
. play better with Real/Helix, StreamTitle needs to be sent at least initially.
. A zero'ing of the listener count occured affecting on-demand relays. A left
  over from the pending queue drop
. various small checks added
. trunk sync-up

2.2-kh9
. drop the pending list for each source, adds clients to active list directly
. intro and fallback to file handling fixed again, recent changes caused
  certain aspects to not work.
. helix/real player wants StreamTitle metadata at the start or else it messes
  up the mp3 playback.
. small stats/xsl updates

2.2-kh8
. fix moving listeners bug recently introduced, affects fallback mounts
. make YP engine, url escape alls stats before sending to YP server.
. make <no-yp> setting work again, but it is being deprecated because of the
  newer <public> setting
. add slow_listeners stat. A count of listeners that fall too far behind
. small doc updates

2.2-kh7
. fix busy poll loop, introduced in kh6, fast clients are now placed at the
  end of the listeners lists and the starting position is recorded. 
. use a loop when checking the burst point, that way reducing burst size over
  HUP works on active streams
. fix 64bit usage in access.log on win32
. Add ability for relays to be switched on or off but still reserve the
  mountpoint.
  - Added <enable> tag to <relay>, takes a 1 (default) or 0
  - change with url /admin/managerelay?relay=/localmount&enable=1
  - added admin page for enabling/disabling relays
. on-[dis]connect scripts are looked up in the mount list instead of copied
  to the source
. type cleanups

2.2-kh6
. sync up with trunk merges
. various internal updates
  - better handling of per-mount stream settings
  - better updating of stats
  - removed unnecessary code
. relay username is 'relay' by default
. shoutcast clients can use per-mount password
. split client write into client write and advance buffer
. source IP stat added for relays/source clients

2.2-kh5
. Added total read and sent stats for each mount.
. Added start time for server and each mount
. Added average bandwidth stats for each mount, incoming and outgoing
. fixup problem with stats client exiting. wasn't unregistering
. outgoing mp3 metadata default to incoming if present
. update to explict stream settings in mount
. prevent cyclic fallback mounts ie A->B B-A where B is down
. reduce time syscall call usage
. lookup mount list password for shoutcast source clients
. 404 unknown requests
. removed dead/duplicated code
. check for non-regular file in fserve

2.2-kh4
. Added FLAC/MIDI to Ogg Handler
. sources count was left increased if client limit was reached
. A failed on-demand relay left new-listener count increased
. streamlist.txt is now built from mount list, not source list as source
  clients could disappear but may have a mount with a fallback specified.
. update auth_url with some pointer checks, added server= to the post
  information sent in 'add'
. missed <subtype> in previous update
. a bad request from client caused a clients count leak

2.2-kh3
. fix nasty buffer reference bug which could cause excessive queue usage
  when using chained theora streams
. fix to server full message, client count handling is now done by the 
  client_create/destroy. client_t created in main handler and passed down
. YP update. The add retrieves the stats not the create, allowing for a
  delay in setting the stats. fixes 'blank server name' error. on-demand
  relays can now add to YP before connection.
. slave thread now checks if shutdown is required after the sleep
. dropped parser/con from source_t
. a few NULL pointer fixes from auth change and some small mem leaks fixed
. don't trigger short delay in fallback file thread

2.2-kh2
. optional url requests for source startup/shutdown.
. 'header' option for listener url auth.  If this header is returned 
  for the auth request then the listener is authenticated.
. per-mount override for <stream-name> <stream-description> <stream-url>
  <genre> and <bitrate>
. fixes to previous auth update

2.2-kh1
. Auth update. could have affected a few cases, report any odd issues
  with connection
  - auth_t part of mount_proxy now
  - xsl/m3u/fserve handling occurs after auth
  - single auth thread used (can be part of a pool)
  - listeners are auth'd on the mountpoint they requested, no matter if 
    a fallback was triggered.
. fix bug introduced in kh6 when url updates are used with vorbis only streams
. source stats for on-demand relays could disappear when they should not
. after intro file has been sent, the listener is placed on stream queue to
  complete the stated burst size
. mount "all" can be used to state mount settings for all non-admin mountpoints
. ignore a 0 metadata interval in mp3 streams, some servers have sent that
. auth_htpasswd, the tmp file failed to work if an absolute path was specified
. auth_url, 'client=' is sent instead of 'id='
. various log msg cleanups

2.1-kh6
. fix reported bugs in auth url.
. at source shutdown make each client release refbuf before going to auth
. added example php script for auth url. thanks to Stephen Nixon
. don't do work on logical stream changes that will be dropped immediately
  afterwards
. make sure m3u does not race against HUP change
. resync with trunk (2.2 fixes)
  . type fixup when referring to time_t
  . do not list failed relays in streamlist.txt
  . xsl caching wasn't working right if many xsl pages were being referenced 
  . playlist logging was being truncated by 1 for ogg

2.1-kh5
. fix YP memory corruption bug introduced in kh4
. resync with trunk
  . updated YP parameters to follow spec.
  . stats on the theora stream
  . doc and xsl updates

2.1-kh4
. cleanup ogg codec build
. handle ogg header pages better
. ogg vorbis streams are rebuilt, but mutli ogg codec streams are
  not, automatically determined now (drop the ogg-rebuild option)
. more error checking in theora handling
. unused code removal
. merge from trunk
  - add cluster-password
  - admin page for updating title via url


2.1-kh3
. merge of the 2 ogg modules
  - drop --enable-vorbis-upodates, use <ogg-rebuild> in the <mount> instead
  - split codec specific code into separate files
. authenticated relays (non-slave host) should work again
. update autoconf macros
. move code around to help with sync-up, code move to auth as well
. yp touch wasn't updating as quick as it should
. resync with trunk
  - make format_mp3 the default handler, passing through the mime type, that
    way unknown streams like AAC, NSV just pass through
  - fixup for naming and authenticating of shoutcast mountpoint
  - docs and win32 build setup

2.1-kh2
. send max_listeners to YP, server limit if mount is unlimited
. add server client_limit and source_limit to stats
. filter duplicate metadata in inline mp3 streams 
. minor fix the xslt
. minor leak on failed range header fserve client
. added AAC and AAC+ content-types for mp3 handler
. resync with trunk
    logging metadata, needs testing
    added <shoutcast-mount> for shoucast DSP compatible clients

2.1-kh1
. Added <intro> tag to <mount> to allow the contents of a nominated file
  (in the same format as the stream) to be sent to a listener before the actual
  stream is.  On-demand relays also work with this.
. fallback-mount can now be used to state a file not just another streaming
  mountpoint (needs to be same format as the stream), fallback-override works
  with this.
. the stats.xsl page lists all stats, status.xsl does not show hidden ones.
. internal cleanups when processing clients. Drop the use of per-client predata
  and use usual buffers instead. more even client write distribution.
. resync with work from 2.1 release and trunk
    shoutcast style source client, needs verifying
    NSV streaming.
    Win32 build cleanups

kh58
. fix stability bug on vorbis rewrite module (--enable-vorbis-updates)
. fixes to URL metadata handling. For vorbis streams they didn't update
  the stats/YP, for MP3 they were ignored if the source stream had no metadata
. fixed small leak in slave host handling
. resync with various trunk changes (aliasing cleanups, win32 timezone offset,
  log messages, docs, xsl files etc)
. for auth_url ignore case for authentication header
. updates to slave handling of stats when relays start/stop, mainly relating
  to on-demand relays
. expand on the trigger for determining if a relay has changed, it was only
  on local mountpoint before.
. if an on-demand relay shuts down, don't remove the YP info

kh57
. don't list hidden mounts on streamlist.txt
. fixup format_vorbis from singleq merge, memory leaks and uninitialised
  pointers.
. for YP, grab the ice-bitrate from stats at the time of adding to server,
  this is useful as YP spec has bitrate as mandatory but bitrate may only
  be determined from stream.
. check per-mount auth settings for per-mount admin requests, useful on
  url metadata updates
. resync web and admin docs with recent xhtml work in trunk

kh56
. provide an alternate sock_write_fmt for old style vsnprintf, this was
  causing no data (on truncation) to be sent on windows (stats.xml).
. restructure stats engine, the inc/dec calls could cause incorrect values
  due to racing with unprocessed events. The maths is done in the engine now
. due to the stats engine, various changes to stats for mountpoints have
  happened, most/all cases look ok. stats relays will need double checking
. added max_listeners stat to each listed mount.
. added icecast version global stat
. fixed bug when a on-demand relay as a fallback was being started when
  it should not of been.
. allow for clients to fallback from on-demand relays that fail to start
. The default mp3 interval is now 16000 bytes (inline with trunk) but this
  can be overridden per-mount with <mp3-metadata-interval> in bytes. Other
  format-specific settings could be possible.
. update fserve thread to check which clients are writable, CPU loading
  could become high if slow and fast clients are connected.

kh55
. let the stats relays loop around instead of blocking on conditions, that
  way we don't get out of sync if we miss a wakeup.
. some NULL checks in stats code were missing.
. updated xsl transform code, small changes to status.xsl as well
. add checks for missing / starting mountpoints
. sync up YP in trunk, this looks to be solid now.
. small include cleanups

kh54
. NULL dereference in yp from previous patch now fixed.
. When override set on an on-demand relay, then the relay now checks to see
  if there are any listeners on the fallback mount, if so then it starts up.
. removed useless per source clients stat, listeners already exists

kh53
. remove the last remaining stats at stream shutdown.
. implement hidden attribute for stats, source stats can be toggled between
  hidden/visible. This is a slight change to stats usage but not major.
. mountpoints on xsl are better handled now
. drop slave-host from xml parsing. They are used internally, created and
  removed by master relays authenticating against the relay user/pass.
. when moving clients don't report on-demand relays as source not available
. when moving clients don't show move clients on mount /a to /a entry.
. race fix for YP entries

kh52
. A lot of resync work with trunk
. add queue shrinking, reduces queues to either last listener or burst
. minor race fix, mp3 url update lock.
. allow for xsl files to show inactive mounts but with active fallbacks
. Add <hidden> attribute to <mount> to prevent xsl display
. add <burst-on-connect> flag to maintain compatability with trunk
. doc updates

kh51
. make config lock a rwlock instead of mutex, removes unneccesary stalling
  and removes possible (although not reported) deadlock cases
. very hard to trigger race in util fixed
. on-demand authenticated relay wasn't being kicked off properly
. allow the prevention of duplicate authenticated clients connecting. The
  mechanism is the same as SVN except duplication checking is a generic
  authentication check and applies to all auth mechanisms.
. make connection handler only sleep when connections are not pending
. mp3 streams with in-line metadata could of created some empty nodes, not
a stability problem, but wasteful.
. small memory leak fixes
. small internal code cleanups

kh50
. removed redundant pointer, adding new clients could cause a memory
  corruption problem
. structured relay startup differently, so that relays operate independently
  from one another. relay threads are now attached.
. resync with trunk. make m3u lookups more general, makes static files work
  with .m3u
. encode names and values from stats when building xsl pages
. add /admin/function[.xsl]?perform=xx the current handlers are
    xx = reopenlog
    xx = updatecfg
. removed old abort test

kh49
. allow for changes in mount settings to update active sources
. allow for slaves to authenticate with the master using the 
  master user/pass.
. if client authenticates as a relay then bypass the normal
  authentication and max listeners check.
. fix a string length problem with relay auth
. if slave fails to auth then log it and go back to waiting
. remove unused/debug code
. updated net code, timeout problem for slaves

kh48
. tweaks to per client write limits
. allow for on-demand to be set on all relays by default
. resync with trunk for refbuf singleq merge
. updated win32 build
. Add Ogg writ handler
. mp3 fixes, url metadata related
. resync yp timeout code to the same as in trunk
. allow for redirecting new clients to other hosts when full

kh47
. per mount burst size was not being referred to properly
. added sync markers to queue for client starts, the buffer with a sync mark
  from the burst point is where a client starts from.
. theora marks a sync marker on a page which has the start of a keyframe.
. vorbis and speex mark sync on all buffers unless theora is used. mp3 sync
  marks on every buffer.
. some code re-org for queue management, allows old refbuf removal even
  on socket read timeout
. place clients that can take more pending data at the beginning of the client
  queue. This allows for reducing client scanning when there's a short timeout

kh46
. New listeners actually drop to fallback mount, silly inverse bug
. typo in mp3 metadata handling, affected error case, rare
. make short delay timeout work when reading from source, minor handling
  case from previous update.
. make the ogg vorbis module use 1000 not 1024 as a factor for stats.
. if a YP server is up but not responding with an error message then show
  a default one.
. fixed a fallback problem and improved the log messages for when fallback
  is triggered.

kh45
. fix minor YP cleanup case when YP server fails and source disconnects
. cleanup from previous patch exposed a potential source reading bug, which
  had shown up because sources could disconnect for no reason.

kh44
. fix segv case for non-auth streams, unchecked in last release.
. only send ICY 200 OK if realplayer else send HTTP/1.0 200 OK
. allow for setting username/password for auth URLs
. still apply timeout to recoverable source read

kh43
. add <username> <password> tags for <relay>, default none, both need to
  be provided for auth to be attempted.
. add url based auth module. example in conf, you can state add and
  remove urls to run for each client, each add is passed id, user, pass, ip,
  user agent. The remove is passed id, user, pass, duration
. make sure the global client count is in sync when auth is used

kh42
. drop the use of thread conditional variables in the connection threads,
  they we not working as they should
. minor cleanups, log messages etc
. re-work auth subsystem to allow for slow auth mechanisms
. added command auth, do that listener auth can be done externally. The
  external command should take a mount, user and pass on separate lines and
  return a status code of 0 (authenticated) or non-zero (reject)

kh41
. fixed 401 reporting on missing urls, should be 404. Handle a very rare
  long lock held case as well

kh40
. make sure public is 0 in the stats tree
. move parse_audio_info back to source.c and make it thread safe
. add debug for YP ok case, debug is supposed to be rarely used after all
. up the per-listener max write threshold
. report 401 for failed auth connections
. add audio/x-mpeg mime type

kh39
. mp3 streams without metadata were not having their metadata initialised
  properly, causing problems when clients connected with metadata capable
  clients.
. send ice-audio-info to clients, provides YP info in relays situations

kh38
. re-sync with svn codebase, update listener auth and docs
. send ICY OK instead of HTTP OK for realplayer test
. minor cleanups

kh37
. add the previous vorbis specific handler back in, it allowed for updates
  via url. enabled via configure --enable-vorbis-updates
. updated admin pages to those in the main tree
. plug some minor memory leaks in yp

kh36
. force yp_remove, log message when found, fixed a race as well
. fix mp3 segv when on-demand relays are used
. fix debug messaging in yp.c, helps to track any YP related problems
. emit icy-br instead of icy-bitrate, allow relays to be on YP listings, but
  handle icy-bitrate as well
. <no-yp> (default 0) in <mount> prevents a mount from going on YP listings
. fixes to ice-audio-info handling.
. make yp thread wait longer than it does at shutdown, allows for final
  yp_remove on closing streams

kh35
. handle YP error conditions better.
. moving clients via url allows on-demand relays to startup/shutdown
. segv bug fixed from previous release, http headers were being prepared
  on mount switchover.

kh34
. minor fixes for YP, fix missing bits from rewrite
  if any YP request fails go back to add
  do a yp touch on inline mp3 updates as well as url metadata updates 
. sync with main tree for minor patches.
. set default stream burst size to 64k (typical player prebuffer size)
. fix some missing web stats
. add <fallback-when-full> (0 default) to <mount>, put new listeners
  on next available fallback, 404 otherwise

kh33
. schedule a YP touch on admin metadata updates
. build fix relating to geturl files.

kh32
. minor compile cleanups from CVS
. make sure a failed script does exit
. report system message on initial log open failure
. update YP thread code, big change.

kh31
. fix for bug when adding clients from pending list.

kh30
. add make static for those who want it
. changed code on list processing for active and pending clients
. changed when format-specific client data gets freed up
. shuffle code around, OK response to source client only source_client_thread
. 404 sent to client on failed on-demand relay
. more re-sync work + various non-functional cleanups

kh29
. revert test harness code left from before which advertised private streams
  and cleanup unwanted messages
. more cleanups, more sync work with CVS
. source_t wasn't going after source client disconnection

kh28
. more re-sync work
. fixed a yp deadlock case for stuffed yp servers.

kh27
. fixed 2 possible deadlock cases
. fixed race wrt to alias lookup after HUP change
. reset ogg stream type to "Ogg Vorbis" even if it isn't, so that YP
  shows icons correctly.

kh26
. fixed YP related bugs, leaks + bad pointer access
. fixed rare segv case in format_mp3
. more cleanup work in source shutdown
. Changed how client http headers are sent back
. Implement on demand relay, enabled with <on-demand>1</on-demand> in <relay>

kh25
. Changed Ogg module
  - added Ogg multiplexing
  - added theora and speex streaming
  - URL updates removed from vorbis, due to multiple codec support, maybe added later.
. continue with more re-sync to CVS work
. fixed a few rare races that had shown up with the re-sync work.

kh24
. more re-sync work with CVS.
. Identified a couple more locking issues via the admin interface
. remove errno use from stream dump routines

kh23
. re-sync with CVS tree, fallback override, no-mount, initial work on
  listener authentication.
. locking updates 
. on-connect/disconnect scripts are started and not waited on.
. icy/ice headers cleanup
. initialise config correctly

kh22
. fix some rare lock races
. page samples fix on EOS flush, reset granulepos to 0 on new stream
. add /admin/streamlist.txt from beta3
. big update of the relay code, supports master relay now
. added yp-log-headers tag in <logging> to disable YP header logging, it
  can make for lots of noise in the logs

kh21
. only send a 200 OK for source connections that are from source clientts
  and not relays
. on failed source init, some setup was not cleared and the source count
  was not decremented
. Check that writes to clients have actual data available
. fix deadlock case with yp
. fix locking for url metdata updates generically
. fix use of non thread-safe function localtime in yp

kh20
. fixed slave/stats shutdown race
. re-applying avl fix for null free function
. fix for vorbis, API changes caused stalls when sending to client
. relay updating/restarting code fixed.
. changes to vorbis input to allow for url updates
. allow for stating artist and title on url

kh19
. fix a few more signed/unsigned problems, affecting mp3 mainly
. re-worked pthread configure option
. update various bits to bring in line with v2.0 beta2

kh18
. another signed/unsigned int bug fixed
. added a short delay trigger for waiting clients, improves bursting
. added --disable-log-ip for the access log
. fix segv when adding clients to inactive relays

kh17
. cleanup some api bits
. fix mp3 bug causing glitches in the audio
. added pidfile support

kh16
. made outgoing serial numbers unique, helps in fallback situations
. revert date field to where it was in access.log. That way it conforms
  to the common log format for analysers.
. changed interal api of the client write function so that handling of
  burst limits is better. Also allow the queue to be more format specific.

kh15
. Updated vorbis input to rebuild stream, forcing pages to contain around
  1 second worth of audio.

kh14
. use localtime_r when available
. compile time switch for enabling/disabling logging IP in access log
. handle source counts better.
. relays retain the source struct so source clients don't steal inactive
  relay mountpoints.

kh13
. update to latest CVS docs
. fixup source timeout, internally it's in milliseconds, and can be
  stated per mount as well as globally.

kh12
. terminate stream if inline metadata does not contain "StreamTitle"
. Added docs by oddsock, and other updates from CVS
. wait for source start/stop run scripts to finish, linuxthreads
  were leaving zombies.
. missing initialiser for relay connection, caused segv on failed
  connections
. fix 3 mp3 metadata mis-alignment bugs on stalled links

kh11
. fix a bad memory reference from kh9
. don't free finished clients too early, bad memory reference

kh10
. when reading from straight mp3 stream (no shoutcast metadata)
  updates via url were not getting to clients. fixed

kh9
. per-mount queue and burst size options
. pre-mount on-connect/on-disconnect scripts
. more re-sync with cvs updates
. force relay re-check on xml update

kh8
. timeout value had multiple applied
. more dead code removal
. make initial mp3 metadata block blank
. fix potential leak in mp3 reading code.

kh7
. added stream type check for client moving
. various cleanups, dead code removal
. minor relay structure mem leak fix
. fix source count check.
. enable the fileserve thread again

kh6
. stream dumping added
. mp3 title update via url fixed up
. fixed up listclients, moveclients.
. re-implemented source fallbacks

kh5
. 2 lots of ;; caused compile problems on windows
. enable curl for YP access
. allow the format specific get buffer routine to return
  NULL for retry, needs to set running to 0 now
. add vorbis header parsing for artist title stats
. add mp3 title parsing for the stats

kh4
. handle relay start and shutdown better.
. apply avl rwlock leak fix
. apply stats thread sleep avoidance fix
. update sock.c errno check
. enable stats/YP thread, add various stat triggers

kh3
. fix burst size larger than queue size case
. prevent relay connections initiating if connection is running
. send server package string from autoconf
. fixed a few segvs from previous update

kh2
. fix mp3 handling, metadata handling wasn't correct.
. fix flow control, locks/source counts with relay
. Added <burst-size> tag default 0 (in bytes)
. Use queue size field, was hardcoded before
. Don't filter refbuf if 0 length but have associated data
. handle EOF/error from socket in format_mp3

kh1 - core update
. removed many locks
. used single queue for source data.
. clients start at end of queue and allowed to repeat writes, thus
  giving bursts at connection. capped at 8 writes
. many secondary things not working. stream dumping, YP, stats,
  web interface
. mp3 incl shoutcast meta and ogg should work 

2003-10-12
    Added documentation

2003-04-23
    Support aliases

2003-03-09
    Support listening on multiple sockets.

2003-03-08
    Support for shoutcast source protocol added.

2003-03-08
    Started implementing generic admin interface. Supports (so far): 
    - dynamic configuration of mount fallbacks
        /admin/fallbacks?mount=/mount&fallback=/fallback
    - setting of mp3 metadata
        /admin/metadata?mount=/mount&mode=updinfo&song=New%20Title
    - dumping raw xml stats
        /admin/rawstats
    - listing all connected clients on a mountpoint: 
        /admin/listclients?mount=/mountname

2003-03-05
    Implemented the ability to reread the config file on SIGHUP. For now, this
    does not affect configuration for currently running sources (only new
    sources and global parameters like max-listeners)

2003-03-02 
    More features:	 
    -- per mountpoint listener maxima   
    -- static configuration of mountpoint fallbacks   
    -- stream dumping (write incoming stream to disk)

2003-02-27
    Fix log buffering on win32 - previously, logs were never flushed, so they
    only got output every few tens or hundreds of lines.

2003-02-27
	Support new icy-audio-info header, to communicate various parameters to
    clients and yp servers, including sample rate, quality, channels, bitrate

2003-02-25
    Full support for relaying mp3 metadata (if turned on in config file)

2003-02-25
    Allow configuration of maximum client queue length (in bytes)

2003-02-14
    Finished full IPv6 support. 

2003-02-12
	Allow configuring local mountpoint seperately from remote mountpoint for
    relays

2003-02-12
	Per mountpoint usernames and passwords (for sources)

2003-02-11
	Now that it's been officially assigned, use application/ogg instead of
	application/x-ogg

2003-02-07
    Allow relaying of mp3 streams from icecast 1.x and shoutcast

2003-02-07
    Added ability to configure individual relays (rather than just all streams
    from a single server).

2003-02-03
    Added support for YP directory services listings
	are only used by the yp listing routines

2003-02-03
    Support command line parameter -b to run in the background (not supported
    on win32)

2002-12-31 
    Implement configurable mountpoint fallbacks (on source exit, clients are
    transferred to another mountpoint automatically, without disconnecting
    them)

2002-12-31
    Implemented full mp3 metadata support.

(older stuff is missing from here)