After reading online I have confirmed that Record-Route headers should be copied to 1xx responses as well.

(closes issue #10113)
Reported by: makoto


git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.4@86756 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_sip.c

@@ -5718,7 +5718,7 @@ static int respprep(struct sip_request *resp, struct sip_pvt *p, const char *msg
 
 	init_resp(resp, msg);
 	copy_via_headers(p, resp, req, "Via");
-	if (msg[0] == '2')
+	if (msg[0] == '1' || msg[0] == '2')
 		copy_all_header(resp, req, "Record-Route");
 	copy_header(resp, req, "From");
 	ot = get_header(req, "To");