Channel drop with tags

Dependencies

• [2] VSOT2QH5 Fixing channel drop (cleanup in other tables + order of reference drop)
• [3] TZ42DX3B Properly dropping a channel
• [4] NGCTMCDP cleaning up the deps and revdeps of unused changes after a channel drop
• [*] SXEYMYF7 Fixing the bad changes in history (unfortunately, by rebooting).

Change contents

• edit in libpijul/src/pristine/sanakirja.rs at line 1881
  [3.627]

  [3.627]
  + channel.tags,
• edit in libpijul/src/pristine/sanakirja.rs at line 1890
  [3.1017]

  [3.1017]
  + UDb::from_page(chan.0[4].into()),
• replacement in libpijul/src/pristine/sanakirja.rs at line 1899
  [2.69]→[3.1137:1183](∅→∅),[3.1137]→[3.1137:1183](∅→∅)
  − if let Some((a, b, c, d)) = channel {
  [2.69]

  [3.0]
  + if let Some((a, b, c, d, e)) = channel {
• replacement in libpijul/src/pristine/sanakirja.rs at line 1905
  [3.285]→[3.285:388](∅→∅)
  − if name.as_str() == name0 {

  − continue

  − }
  [3.285]

  [3.388]
  + assert_ne!(name.as_str(), name0);
• edit in libpijul/src/pristine/sanakirja.rs at line 1934
  [3.1359]

  [2.596]
  + btree::drop(&mut self.txn, e)?;