added missing CHANGES entry:

 292.   [bug]           Due to problems with the way some operating systems
                        handle simultaneous listening on IPv4 and IPv6
                        addresses, the server no longer listens on IPv6
                        addresses by default.  To revert to the previous
                        behavior, specify "listen-on-v6 { any; };" in
                        the config file.

CHANGES

+ 292.	[bug]		Due to problems with the way some operating systems
+			handle simultaneous listening on IPv4 and IPv6
+			addresses, the server no longer listens on IPv6
+			addresses by default.  To revert to the previous
+			behavior, specify "listen-on-v6 { any; };" in
+			the config file.
+
  291.	[func]		Caching servers no longer send outgoing queries
 			over TCP just because the incoming recursive query
 			was a TCP one.