remove double auth

kamailio/default.cfg

@@ -505,12 +505,9 @@ route[HANDLE_REFER]
     } else {
        $var(referred_by) = $_s(<sip:$Au>;created=true);
     }
-    $xavp(regcfg=>match_received) = $su;
-    if(registered("location", "$rz:$Au", 2, 1) == 1) {
-        route(AUTH);
-        if($avp(is_registered) = "true") {
-           $var(referred_by) = $_s($var(referred_by);endpoint_id=$(xavp(ulattrs=>token){re.subst,/(.*)@(.*)/\1/});account_id=$(xavp(ulattrs=>token){re.subst,/(.*)@(.*)/\2/}));
-        }
+    route(AUTH);
+    if($avp(is_registered) = "true") {
+       $var(referred_by) = $_s($var(referred_by);endpoint_id=$(xavp(ulattrs=>token){re.subst,/(.*)@(.*)/\1/});account_id=$(xavp(ulattrs=>token){re.subst,/(.*)@(.*)/\2/}));
     }
 
     remove_hf_re("^Referred-By");