Merged revisions 228896 via svnmerge from

https://origsvn.digium.com/svn/asterisk/branches/1.4

........
  r228896 | lmadsen | 2009-11-09 09:37:43 -0600 (Mon, 09 Nov 2009) | 6 lines
  
  Update WARNING message.
  Update a WARNING message to give a suggested fix when encountered.
  
  (closes issue #16198)
  Reported by: atis
  Tested by: atis
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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@228897 65c4cc65-6c06-0410-ace0-fbb531ad65f3

main/channel.c

@@ -856,7 +856,7 @@ __ast_channel_alloc_ap(int needqueue, int state, const char *cid_num, const char
 
 	if (needqueue) {
 		if (pipe(tmp->alertpipe)) {
-			ast_log(LOG_WARNING, "Channel allocation failed: Can't create alert pipe!\n");
+			ast_log(LOG_WARNING, "Channel allocation failed: Can't create alert pipe! Try increasing max file descriptors with ulimit -n\n");
 alertpipe_failed:
 			if (tmp->timer) {
 				ast_timer_close(tmp->timer);