listen on 127.0.0.1 instead of 'localhost'

gateway/httpgateway.cpp

@@ -91,5 +91,5 @@ void HttpGateway::work(RequestWorker &worker)
 	};
 	server.Get("/(.*)", handler);
 	server.Post("/(.*)", handler);
-	server.listen("localhost", 1234);
+	server.listen("127.0.0.1", 1234);
 }