message: Close connection on any errmsg callback error.
  Summary: As in title. The socket delivering errors this way is probably a bad sign.
diff: @@ -1024,11 +1024,6 @@ void QuicClientTransport::errMessage(
  (cmsg.cmsg_level == SOL_IPV6 && cmsg.cmsg_type == IPV6_RECVERR)) {
  const struct sock_extended_err* serr =
  reinterpret_cast<const struct sock_extended_err*>(CMSG_DATA(&cmsg));
  - auto connectionError = (serr->ee_errno == ECONNREFUSED) ||
  - (serr->ee_errno == ENETUNREACH) || (serr->ee_errno == ENETDOWN);
  - if (!connectionError) {
  - return;
  - }
  auto errStr = folly::errnoStr(serr->ee_errno);
  runOnEvbAsync([errString = std::move(errStr)](auto self) {
  auto quicError = std::make_pair(
  