dhtproxy: fix indirect mem leak caused by 208758e

src/dht_proxy_server.cpp

@@ -126,7 +126,7 @@ DhtProxyServer::makeHttpServerSettings(const unsigned int max_pipelined_requests
     settings.separate_accept_and_create_connect(true);
     settings.logger(logger_);
     settings.protocol(restinio::asio_ns::ip::tcp::v6());
-    settings.request_handler(this->createRestRouter());
+    settings.request_handler(std::move(this->createRestRouter()));
     // time limits                                              // ~ 0.8 month
     std::chrono::milliseconds timeout_request(std::numeric_limits<int>::max());
     settings.read_next_http_message_timelimit(timeout_request);