Summary:
Ref T4122.
- For Diffusion, we need "allow null" (permits selection of "No Credential") for anonymous HTTP repositories.
- For Diffusion, we can make things a little easier to configure by prefilling the username.
Test Plan: Used UIExample form. These featuers are used in a future revision.
Reviewers: btrahan
Reviewed By: btrahan
CC: aran
Maniphest Tasks: T4122
Differential Revision: https://secure.phabricator.com/D7624