docs: def serve_forever(self, poll_interval=0.5):
          """Handle one request at a time until shutdown.
  
          Polls for shutdown every poll_interval seconds. Ignores
          self.timeout. If you need to do periodic tasks, do them in
          another thread.
          """
          self._serving_event.set()
          self._shutdown_request_event.clear()
          TCPServer.serve_forever(self, poll_interval=poll_interval)