kamailio.cfg: removed append_branch() from failure_route

- it is no longer necessary

etc/kamailio.cfg

@@ -837,7 +837,7 @@ failure_route[FAIL_ONE] {
 	# uncomment the following lines if you want to block client 
 	# redirect based on 3xx replies.
 	##if (t_check_status("3[0-9][0-9]")) {
-	##t_reply("404","Not found");
+	##	t_reply("404","Not found");
 	##	exit;
 	##}
 
@@ -845,8 +845,6 @@ failure_route[FAIL_ONE] {
 	# calls to a different new destination
 	##if (t_check_status("486|408")) {
 	##	sethostport("192.168.2.100:5060");
-	##	append_branch();
-	##	# do not set the missed call flag again
 	##	t_relay();
 	##}
 }