Summary:
Ref T1751. When commit messages include language like "reverts X", parse it. This change doesn't do anything with the commits yet.
I attempted to cover all "natural" VCS messages and all reasonable human variations of these messages.
Test Plan: Added unit tests. Added `var_dump()` and used `scripts/repository/reparse.php --message X` to reparse some commit messages, with expected results.
Reviewers: btrahan
Reviewed By: btrahan
CC: aran
Maniphest Tasks: T1751
Differential Revision: https://secure.phabricator.com/D5840
2b2641192a