Summary: adds a new FIELD and a new VALUE to support this. Slightly dodgy because priorities do not have phids so we have to special case how we handle this in a few spots. Ref T4294.
Test Plan: made a new rule to get cc'd on unbreak now and wishlist tasks. verified got cc'd correctly and not cc'd correctly.
Reviewers: epriestley
Reviewed By: epriestley
CC: Korvin, epriestley, aran
Maniphest Tasks: T4294
Differential Revision: https://secure.phabricator.com/D8156
1527a967c0