 ``unfold`` and ``forceset`` to be ``True``.

:param ignoretz:
    If set ``True``, time zones in parsed strings are ignored and a naive
    :class:`datetime.datetime` object is returned.

:param tzids:
    If given, a callable or mapping used to retrieve a
    :class:`datetime.tzinfo` from a string representation.
    Defaults to :func:`dateutil.tz.gettz`.

:param tzinfos:
    Additional time zone names / aliases which may be present in a string
    representation.  See :func:`dateutil.parser.parse` for more
    information.

:return:
    Returns a :class:`dateutil.rrule.rruleset` or
    :class:`dateutil.rrule.rrule`
r+