- Changes the auth settings to support more than two auth types
- Added a proxy auth type with settings for user and optionally group
headers
- Added a global middleware `proxy_auth_middleware` to handle proxy auth
(it does nothing if any other auth mode is set)
- Added support for proxy auth to `get_auth_mode`, `login_required`,
`api_login/out`, and `api_auth_check`
- Added a backend check to make protect the API for settings when admin
is required
---------
Co-authored-by: Joshua Tag Howard <git@jthoward.dev>
Co-authored-by: Alex <alex.bilbie1@gmail.com>
