message: fix connection close bug
  got it backwards!
diff: @@ -933,7 +933,7 @@ impl Connection {
  pub fn process_output(&mut self, cur_time: Instant) -> (Vec<Datagram>, Option<Duration>) {
  match &self.state {
  State::Closing { error, timeout, .. } => {
  - if *timeout < cur_time {
  + if *timeout > cur_time {
  (self.output(cur_time), None)
  } else {
  // Close timeout expired, move to Closed
  