message: Simplify code in set_initial_limits
  I don't think the swapping is needed.
diff: @@ -1164,10 +1164,8 @@ impl Connection {
  }
  fn set_initial_limits(&mut self) {
  - let swapped = mem::replace(&mut self.tps, Rc::default());
  - {
  - let tph = swapped.borrow();
  - let remote = tph.remote();
  + let tps = self.tps.borrow();
  + let remote = tps.remote();
  self.indexes.remote_max_stream_bidi =
  StreamIndex::new(remote.get_integer(tp_const::INITIAL_MAX_STREAMS_BIDI));
  self.indexes.remote_max_stream_uni =
  @@ -1176,8 +1174,6 @@ impl Connection {
  .borrow_mut()
  .conn_increase_max_credit(remote.get_integer(tp_const::INITIAL_MAX_DATA));
  }
  - mem::replace(&mut self.tps, swapped);
  - }
  fn validate_odcid(&self) -> Res<()> {
  if let Some(info) = &self.retry_info {
  