Fixed RRULE format (shouldn't allow multi-case values)
Fixed RRULE format (shouldn't allow multi-case values)

tschaible/ical4j,ical4j/ical4j,tschaible/ical4j,ariordan/ical4j,amannm/ical4j,amannm/ical4j,voronaam/ical4j,tschaible/ical4j,ariordan/ical4j,voronaam/ical4j,ical4j/ical4j,voronaam/ical4j,amannm/ical4j,ariordan/ical4j,ical4j/ical4j