KAZOO-3840: remove ua check and updated log line

kamailio/default.cfg

@@ -519,10 +519,10 @@ route[PREPARE_INITIAL_REQUESTS]
     if (loose_route()) {
         $xavp(regcfg=>match_received) = $su;
         $xavp(regcfg[0]=>match_contact) = $(ct{nameaddr.uri});
-        if(registered("location", "$rz:$Au", 6) == 1 && ($ua =~ "Grandstream") ) {
-           xlog("L_INFO", "$ci|chk|allowing initial route-set for $Au");
+        if(registered("location", "$rz:$Au", 6) == 1) {
+           xlog("L_INFO", "$ci|log|allowing initial route-set for $Au");
         } else {
-           xlog("L_WARN", "$ci|end|denying initial request with route-set");
+           xlog("L_WARN", "$ci|end|dropping initial request with route-set");
            sl_send_reply("403", "No pre-loaded routes");
            exit();
         }