Add info about stability improvements

README.md

@@ -6,12 +6,17 @@ Version 2.1.1:
 
 * Enhancements
  * Add new -t or --timeout option. Normally, when playing audio from a source, the Shairport Sync device is unavailable to other devices requesting to play through it -- it returns a "busy" signal to those devices. If the audio source disappears without warning, the play session automatically terminates after a timeout period (default 120 seconds) and the device goes from being "busy" to being available for new play requests again. This option allows you to set that timeout period in seconds.
-In addition, setting the timeout period to 0 means that play requests -- say from other devices on the network -- can interrupt and terminate the current session at any time. In other words, the "busy" feature of the device -- being not available to another player while playing from an existing source -- is turned off. 
+In addition, setting the timeout period to 0 means that play requests -- say from other devices on the network -- can interrupt and terminate the current session at any time. In other words, the "busy" feature of the device -- refusing connections from other players while playing from an existing source -- is turned off. 
  * Allow -B and -E commands to have arguments, e.g. -B '/usr/bin/logger "Starting to play"' is now legitimate.
 
 * Annoying things you should know about if you're updating from 2.1:
  * Build now depends on the library libpopt -- see "Building and Installing" below.
 
+* Stability Improvements
+ * Fixed a bug which would silence output after a few hours.
+ * Tightened up management of packet buffers.
+ * Improved estimate of lead-in silence to achieve initial synchronisation.
+
 Version 2.1:
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