Summary:
- Adds "Commandeer Revision", to allow you to plunder revisions from those lost to sea (e.g., interns who have left or co-workers who are dealing with a family emergency).
- Removes admin-abandon to simplify things, since you can just Commandeer + Abandon now.
- There are other workarounds available but this is the natural/expected workflow (and the one everyone always asks for) and there's no real reason not to allow it.
Test Plan: Swashbuckled.
Reviewers: cpiro, btrahan, vrana, jungejason
Reviewed By: cpiro
CC: aran, zeeg
Differential Revision: https://secure.phabricator.com/D2257
68d90ef698