- notifications to administrators for failed backup/restore runs and
locations without a successful backup for two days (once a day)
- setup check in the admin overview: error when the key/kit is not set
up, warning for missing, old or failed backups
- security events (recovery kit downloaded, location removed,
append-only turned off, retention changed, snapshots forgotten) go to
the audit log and are announced to all administrators, from the web
and from occ; the scheduled weekly cleanup is logged only
- fix: the recovery-kit download link failed the CSRF check (412); it
now requires a recent password confirmation instead, like creating the
key, removing a location and restoring