relay.enableTcpKeepalive config option. default = false

golpe.yaml

@@ -92,6 +92,8 @@ config:
   - name: relay__autoPingSeconds
     default: 55
     noReload: true
+  - name: relay__enableTcpKeepalive
+    default: false
   - name: relay__queryTimesliceBudgetMicroseconds
     default: 10000
   - name: relay__maxFilterLimit

src/RelayWebsocket.cpp

@@ -82,7 +82,7 @@ void RelayServer::runWebsocket(ThreadPool<MsgWebsocket>::Thread &thr) {
         ws->setUserData((void*)c);
         connIdToConnection.emplace(connId, c);
 
-        {
+        if (cfg().relay__enableTcpKeepalive) {
             int optval = 1;
             if (setsockopt(ws->getFd(), SOL_SOCKET, SO_KEEPALIVE, &optval, sizeof(optval))) {
                 LW << "Failed to enable TCP keepalive: " << strerror(errno);