Add new syslog options to changelog

CHANGES.txt

@@ -9,6 +9,12 @@
   a homogeneous process group.  This allows each process to have it own
   working directory.  Patch by Perttu Ranta-aho.
 
+- Added new ``stdout_syslog`` and ``stderr_syslog`` options to the config
+  file.  These are boolean options that indicate whether process output will
+  be sent to syslog.  Supervisor can now log to both files and syslog at the
+  same time.  Specifying a log filename of ``syslog`` is still supported
+  but deprecated.  Patch by Jason R. Coombs.
+
 3.0 (2013-07-30)
 ----------------