Querying the backendAddress api, and switching back to the login display on error.
Querying the backendAddress api, and switching back to the login display on error.

Summary:
Merge branch 'master' into T34-backend-address

Changing backendAddress to being a POST request, to match the pattern in the rest APIs. This is basically a hack, probably.

However, I did get a login to successfully work! Whoo!

Reviewers: swsnider

Reviewed By: swsnider

CC: jwall

Maniphest Tasks: T34

Differential Revision: http://d.sil.as/D86

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