Avoid polling the reading future again after disconnection

Dependencies

• [2] JBFDZQ46 Formatting
• [3] KNLLUDOI Correct usage of `tokio::select!`
• [4] 7FRJYUI6 Reboot because of a bad change

Change contents

• edit in thrussh/src/server/mod.rs at line 490
  [3.807]

  [3.218950]
  + let mut is_reading = true;
• edit in thrussh/src/server/mod.rs at line 495
  [3.869]

  [3.219101]
  + is_reading = false;
• edit in thrussh/src/server/mod.rs at line 528
  [3.966]

  [3.220266]
  + is_reading = true;
• edit in thrussh/src/server/mod.rs at line 576
  [3.1036]

  [3.1036]
  + if !is_reading {

  + reading.set(start_reading(

  + stream_read,

  + buffer,

  + session.common.cipher.clone(),

  + ));

  + is_reading = true

  + }
• edit in thrussh/src/server/mod.rs at line 585
  [3.1083]

  [3.1083]
  + is_reading = false;
• edit in thrussh/src/server/mod.rs at line 588
  [2.985]→[3.1121:1214](∅→∅),[3.1121]→[3.1121:1214](∅→∅)
  − } else {

  − reading.set(start_reading(r, b, session.common.cipher.clone()))