sync_maildirs.sh admin account sync
The sync_maildirs.sh cannot sync admin mail, because of a path error (an error is shown).
We could either sync admin (it's a special case) or not sync at all, avoiding the error.
Often, admin mailbox is full of old unread useless mails, so I'm tempted to leave it unsynced.
But, maybe, all users should be treated equal.