update NEWS

NEWS

@@ -18,6 +18,30 @@ Feature differences from Xiph release
 
 any extra tags are shown in the conf/icecast.xml.dist file
 
+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.