Move handling of 408 response so there is no misleading warning message.

(closes issue ASTERISK-20060)
Reported by: Walter Doekes
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Merged revisions 373848 from http://svn.asterisk.org/svn/asterisk/branches/1.8
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Merged revisions 373849 from http://svn.asterisk.org/svn/asterisk/branches/10
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Merged revisions 373850 from http://svn.asterisk.org/svn/asterisk/branches/11


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@373852 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_sip.c

@@ -22497,7 +22497,6 @@ static void handle_response_invite(struct sip_pvt *p, int resp, const char *rest
 		}
 		break;
 
-	case 408: /* Request timeout */
 	case 481: /* Call leg does not exist */
 		/* Could be REFER caused INVITE with replaces */
 		ast_log(LOG_WARNING, "Re-invite to non-existing call leg on other UA. SIP dialog '%s'. Giving up.\n", p->callid);
@@ -22602,6 +22601,7 @@ static void handle_response_invite(struct sip_pvt *p, int resp, const char *rest
 		}
 		break;
 
+	case 408: /* Request timeout */
 	case 405: /* Not allowed */
 	case 501: /* Not implemented */
 		xmitres = transmit_request(p, SIP_ACK, seqno, XMIT_UNRELIABLE, FALSE);