message: Do not crash if worker evb isn't running when shutdowning QuicServer
  Summary:
  Currently this check is will fail if worker evb isn't running yet. I'm
  changing it so that if worker evb isn't running, just let it pass.
diff: @@ -364,7 +364,9 @@ void QuicServer::shutdown(LocalErrorCode error) {
  return;
  }
  for (auto& worker : workers_) {
  - DCHECK(!worker->getEventBase()->isInEventBaseThread());
  + DCHECK(
  + !worker->getEventBase()->isRunning() ||
  + !worker->getEventBase()->isInEventBaseThread());
  }
  shutdown_ = true;
  for (auto& worker : workers_) {
  