Add a log message that was requested by the masses in the developer tutorial

session at Astricon.  chan_sip did not output any message when a call was
rejected because the extension was not found.  This adds a verbose message
(at verbose level 3) to note when this happens.


git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.4@83941 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_sip.c

@@ -13659,8 +13659,14 @@ static int handle_request_invite(struct sip_pvt *p, struct sip_request *req, int
 		if (!replace_id && gotdest) {	/* No matching extension found */
 			if (gotdest == 1 && ast_test_flag(&p->flags[1], SIP_PAGE2_ALLOWOVERLAP))
 				transmit_response_reliable(p, "484 Address Incomplete", req);
-			else
+			else {
 				transmit_response_reliable(p, "404 Not Found", req);
+				if (option_verbose > 2) {
+					ast_verbose(VERBOSE_PREFIX_3 "Call from '%s' to extension"
+						" '%s' rejected because extension not found.\n",
+						S_OR(p->username, p->peername), p->exten);
+				}
+			}
 			p->invitestate = INV_COMPLETED;	
 			update_call_counter(p, DEC_CALL_LIMIT);
 			sip_scheddestroy(p, DEFAULT_TRANS_TIMEOUT);