Handle dayOfWeek+dayOfMonth the same as vixiecron

    crontab(5) says
    > The day of a command's execution can be specified by two fields -
    > day of
    > month, and day of week. If both fields are restricted (ie, aren't
    > *),
    > the command will be run when either field matches the current
    > time.

    The current behaviour is to require both fields to match.