Merged revisions 219324 via svnmerge from

https://origsvn.digium.com/svn/asterisk/trunk

................
  r219324 | mmichelson | 2009-09-17 17:22:01 -0500 (Thu, 17 Sep 2009) | 12 lines
  
  Merged revisions 219320 via svnmerge from 
  https://origsvn.digium.com/svn/asterisk/branches/1.4
  
  ........
    r219320 | mmichelson | 2009-09-17 17:20:50 -0500 (Thu, 17 Sep 2009) | 6 lines
    
    Send a 100 Trying response when we detect a spiral.
    
    This was problematic during spiral tests at SIPit...
    along with some other things as well.
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git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.6.0@219365 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_sip.c

@@ -17454,6 +17454,7 @@ static int handle_request_invite(struct sip_pvt *p, struct sip_request *req, int
 			char *at = strchr(uri, '@');
 			char *peerorhost;
 			ast_debug(3, "Potential spiral detected. Original RURI was %s, new RURI is %s\n", p->initreq.rlPart2, req->rlPart2);
+			transmit_response(p, "100 Trying", req);
 			if (at) {
 				*at = '\0';
 			}