Remove cyr_systemd_helper completely.
    
    It turns that, at least in cyrus 3, the cyr_systemd_helper script will
    end up wiping out your databases every time the daemon starts.  It was
    something that was needed to handle the horror that was Berkeley
    DB/Sleepycat DB/whatever it's called today, but Cyrus no longer supports
    BDB and so there's no point.