Summary:
We currently allow you to assign code review to disabled users, but
should not.
Test Plan:
- Created revisions with no reviewers and only disabled reviewers, was
appropriately warned.
- Looked at a disabled user handle link, was clearly informed.
- Tried to create a new revision with a disabled reviewer, was rebuffed.
Reviewers: btrahan, jungejason
Reviewed By: btrahan
CC: aran
Differential Revision: https://secure.phabricator.com/D1429
e2c75d5dc2