Send correctly formatted channel failure message (including the recipient channel number)

Dependencies

• [2] 7FRJYUI6 Reboot because of a bad change
• [3] 2WEO7OZL Version updates: getting rid of anyhow + moving to Tokio 1.0

Change contents

• replacement in thrussh/src/server/encrypted.rs at line 712
  [2.258183]→[2.258183:258687](∅→∅)
  − debug!(

  − "{:?}, line {:?} req_type = {:?}",

  − file!(),

  − line!(),

  − std::str::from_utf8(x)

  − );

  − if let Some(ref mut enc) = self.common.encrypted {

  − push_packet!(enc.write, {

  − enc.write.push(msg::CHANNEL_FAILURE);

  − });

  − }
  [2.258183]

  [2.258687]
  + warn!("unknown channel request {}", String::from_utf8_lossy(x));

  + self.channel_failure(channel_num);