message: Output hex for input
diff: @@ -493,6 +493,8 @@ impl Connection {
  fn input(&mut self, d: Datagram, cur_time: u64) -> Res<()> {
  let mut slc = &d[..];
  + qdebug!(self, "input {}", hex("", &**d));
  +
  // Handle each packet in the datagram
  while !slc.is_empty() {
  let mut hdr = match decode_packet_hdr(self, slc) {
  