Add congestion message to SIP history

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@30992 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_sip.c

@@ -2353,6 +2353,7 @@ static int auto_congest(void *nothing)
 		/* XXX fails on possible deadlock */
 		if (!ast_channel_trylock(p->owner)) {
 			ast_log(LOG_NOTICE, "Auto-congesting %s\n", p->owner->name);
+			append_history(p, "Cong", "Auto-congesting (timer)");
 			ast_queue_control(p->owner, AST_CONTROL_CONGESTION);
 			ast_channel_unlock(p->owner);
 		}