Add RuleSet description for PMD
Add RuleSet description for PMD

Refs pmd/pmd#470

RxBroadcast/RxBroadcast,RxBroadcast/RxBroadcast,whymarrh/RxBroadcast,RxBroadcast/RxBroadcast,whymarrh/RxBroadcast,RxBroadcast/RxBroadcast