docs: function _socket(socket, keepAlive) {
      socket.setTimeout(0);
      socket.setNoDelay(true);
  
      if (keepAlive) {
        if (socket.setKeepAlive) {
          socket.setKeepAlive(true, 0);
        }
        else if (socket.pair.cleartext.socket.setKeepAlive) {
          socket.pair.cleartext.socket.setKeepAlive(true, 0);
        }
      }
    }