Orphaned MySQL backups
Consider the case where there is a database called foo.
Once per day this will be dumped to disk, beneath /var/backups/mysql.
The local backup will be kept for easy restoration, and the backup will also be included in the backup2l dump.
If this database is subsequently removed "mysql --user=root -e 'drop database foo'" the local dump is never removed.
I'd suggest we have a post-backup script that does one of two things:
1. Removes files older than a week. This will ensure that orphaned database dumps are cleaned up shortly.
2. Optionally removes all local dumps. Since they will be present in the backup2l .tar.gz file.