Comment 2 for bug 1349364

The original reason that www-authenticate returns a catch-all "swift" response is that the auth_uri parameter is not available to keystoneauth. The proxy-server.conf file looks like::

    [filter:auth_token]
    ...
    auth_uri = https://identity-endpoint/v2.0
    ...

    [filter:keystoneauth]
    use = egg:swift#keystoneauth

It might seem a trivial change to move the auth_uri to the [default] section or to make a copy in [filter:keystoneauth]. However, that requires action by deployers....so your proposed patch is not backward compatible.