message: trivial: SendStream::send_internal() does not need to be pub
  Sorry I should've noticed this in the review but I didn't.
diff: @@ -629,7 +629,7 @@ impl SendStream {
  }
  }
  - pub fn send_internal(&mut self, buf: &[u8], atomic: bool) -> Res<usize> {
  + fn send_internal(&mut self, buf: &[u8], atomic: bool) -> Res<usize> {
  if buf.is_empty() {
  qerror!("zero-length send on stream {}", self.stream_id.as_u64());
  return Err(Error::InvalidInput);
  