v0.8.4

Added

• You now hear about updates without opting into installs. The update check only ran when
  unattended auto-apply was switched on, so with it off (the default) nobody was ever told a new
  version existed. The check now always runs; an available update shows a banner in the web UI
  with a one-click "Update now" wired to the existing apply path, and the new updateNotify
  setting (on by default) controls the announcements. Unattended auto-apply itself is unchanged
  and stays opt-in. Part of the same policy RepoYeti and ReDesign follow as of today.