Insetad of handling OpenID and username/password authentication in
the GWT UI redirect all forms of authentication through /login/.
This allows the server to return normal HTML to handle the user
sign-in process. By using typical form based HTML for username
and password login browsers can offer the choice to save this
data locally in the user's password store.
Using /login/ for all authentication simplifies some UI code and
may make things easier for plugins. A plugin only needs to do a
redirect to /login/ to upgrade an anonymous user to be an
authenticated one.
Change-Id: I0d7a59693a257c5da8bab19e3ef0a627f8a41c6e
63befc1cc8