message: transport: Also send CloseConnection frames only in 1RTT space
diff: @@ -1696,10 +1696,14 @@ impl FrameGenerator for CloseGenerator {
  &mut self,
  c: &mut Connection,
  _now: Instant,
  - _e: Epoch,
  + epoch: Epoch,
  _mode: TxMode,
  _remaining: usize,
  ) -> Option<(Frame, Option<Box<FrameGeneratorToken>>)> {
  + if epoch != 3 {
  + return None;
  + }
  +
  if let State::Closing {
  error: cerr,
  frame_type,
  