Fixing asynchronicity problems in SSH

Dependencies

• [2] I52XSRUH Massive cleanup, and simplification
• [3] UDHP4ZVB Fixing SSH asynchronicity issues
• [4] SXEYMYF7 Fixing the bad changes in history (unfortunately, by rebooting).

Change contents

• edit in pijul/src/remote/ssh.rs at line 266
  [3.1048]→[3.1048:1137](∅→∅)
  − // type FutureUnit = futures::future::Ready<Result<(Self, Session), anyhow::Error>>;
• edit in pijul/src/remote/ssh.rs at line 271
  [3.32768]→[3.1139:1194](∅→∅)
  − // futures::future::ready(Ok((self, session)))
• edit in pijul/src/remote/ssh.rs at line 421
  [3.6540]

  [3.6540]
  + }

  + State::Channel { ref mut sender } => {

  + debug!("state channel");

  + sender.send(data).await?
• edit in pijul/src/remote/ssh.rs at line 426
  [3.6558]→[3.6558:6637](∅→∅)
  − State::Channel { ref mut sender } => sender.send(data).await?,
• edit in pijul/src/remote/ssh.rs at line 433
  [2.311]

  [3.6750]
  + debug!("state archive");
• edit in pijul/src/remote/ssh.rs at line 740
  [3.50331]

  [3.10129]
  + debug!("receiving channel");
• edit in pijul/src/remote/ssh.rs at line 742
  [3.10183]

  [3.10183]
  + debug!("msg = {:?}", msg.len());
• edit in pijul/src/remote/ssh.rs at line 744
  [3.10226]

  [3.10226]
  + debug!("break");
• edit in pijul/src/remote/ssh.rs at line 748
  [3.51299]

  [3.51299]
  + debug!("from dump done");
• edit in pijul/src/remote/ssh.rs at line 757
  [3.51588]→[3.51588:51716](∅→∅)
  − self.c

  − .data(format!("change {}\n", h.to_base32()).as_bytes())

  − .await?;
• edit in pijul/src/remote/ssh.rs at line 761
  [2.515]→[3.51899:52027](∅→∅),[3.51899]→[3.51899:52027](∅→∅)
  − self.c

  − .data(format!("change {}\n", h.to_base32()).as_bytes())

  − .await?;
• replacement in pijul/src/remote/ssh.rs at line 765
  [3.52117]→[3.52117:52158](∅→∅)
  − debug!("hashes = {:?}", hashes);
  [3.52117]

  [3.52158]
  + debug!("hashes = {:#?}", hashes);
• replacement in pijul/src/remote/ssh.rs at line 767
  [3.52222]→[3.10254:10334](∅→∅)
  − self.download_changes(&hashes, &mut send, &mut repo.changes_dir, false)
  [3.52222]

  [3.52289]
  + self.download_changes(&hashes, &mut send, &mut repo.changes_dir, true)
• edit in pijul/src/commands/clone.rs at line 88
  [3.185778]

  [3.185778]
  + remote.finish().await?;