kamailio.cfg: use SIP-source-address

* default behavior of rtpengine is trust-address
* use SIP-source-address for nat_uac_test("8")

etc/kamailio.cfg

@@ -851,9 +851,9 @@ route[NATMANAGE] {
 
 #!ifdef WITH_RTPENGINE
 	if(nat_uac_test("8")) {
-		rtpengine_manage("replace-origin replace-session-connection");
+		rtpengine_manage("SIP-source-address replace-origin replace-session-connection");
 	} else {
-		rtpengine_manage("trust-address replace-origin replace-session-connection");
+		rtpengine_manage("replace-origin replace-session-connection");
 	}
 #!else
 	if(nat_uac_test("8")) {