Summary:
Ref T2683. Currently, DiffusionRequest has four different "commitey" things:
- `commit`
- `rawCommit`
- `symbolicCommit`
- `stableCommit`
Of these, only two are actually distinct, useful values: `symbolicCommit` (which holds the value the request originally contained, if one existed) and `stableCommit` (which resolves that value, or the value implied by its omission, into a stable, permanent commit identifier).
- `rawCommit` is equivalent to `symbolicCommit` and can be simply removed.
- `commit` has some sketchy magic around it that needs to be pulled out before it can be jettisoned.
Test Plan: Viewed SVN, Git, and Mercurial repositories. Viewed brwose/history/change/tag/branch/etc views.
Reviewers: btrahan
Reviewed By: btrahan
Subscribers: epriestley
Maniphest Tasks: T2683
Differential Revision: https://secure.phabricator.com/D9098