• #957: Document borgmatic's limitations around parallelism—both its own and Borg's. See the
  documentation for more information:
  https://torsion.org/borgmatic/how-to/make-per-application-backups/#limitations
• #1165: Fix for when the systemd service directories (RuntimeDirectory and StateDirectory) each
  contain multiple paths.
• #1168: Fix for the "list", "info", and "delete" options in "extra_borg_options" being ignored
  when "--archive" is omitted with Borg 1.x.
• #1169: Fix for a regression in the ZFS, LVM, and Btrfs hooks in which partial excludes of
  snapshot paths were ignored.
• #1170: Fix for an inconsistent log level for Borg's last output line before exiting.
• #1172: Add an "environment" option to the Sentry monitoring hook.
• #1176: Fix the "--repository" flag not applying to command hooks.
• Add a "rename" option to "extra_borg_options" to support passing arbitrary flags to "borg
  rename".
• Add documentation on patterns and excludes:
  https://torsion.org/borgmatic/reference/configuration/patterns-and-excludes/
• Drop support for Python 3.9, which has been end-of-lifed.