Sets the recurrence of the streams global event structure
(PHP 3>= 3.0.13, PHP 4 )
int mcal_event_set_recur_monthly_wday ( intstream, intyear, intmonth, intday, intinterval )
mcal_event_set_recur_monthly_wday() sets the
streams global event structure's recurrence to the given value to
be reoccuring on a monthly by week basis, ending at the given
date.