Merge branch 'beta'

* beta: (60 commits)
  MBS-6677: fix UnconfirmedEmailAddresses test for Controller::Account::donate
  Use https where applicable for cover art uploads
  Revert "Merge branch 'mbs-6529' into beta"
  Revert "Merge remote-tracking branch 'reosarevok/mbs-6499' into beta"
  MBS-6667: add back edit note field in the relationship editor
  trailing comma in guess case file
  MBS-6671: unformatTrackLength should treat empty string as null track length
  Add Controller::User::Edits::cancelled to UnconfirmedEmailAddresses test
  MBS-6657: Require /ws/2 requests use a positive limit and offset
  Fix TagLookup tests now that the mock external search results have changed
  Fix external search tests; Maybe[] more fields to construct external search results
  Remove dead code from MB::S::Replication
  Remove unused admin/bin scripts
  MBS-6650: Escape example relationships in relationship admin pages
  Remove *-truncate.sql, which are unused.
  Remove non-functioning and never-run rdfa tests
  Don't construct a LinkType with an undef long_link_phrase
  MBS-6588: Undo changes for recording/release/release group search
  MBS-6418: Replace HTML::FormHandler with custom validation for relationship editor
  MBS-6656: relationship editor can't count
  ...
Switch to exintro, wikipedia's API changed.
Merge branch 'master' into beta