inverse-inc/sogo — pull request #11 by Xenopathic (2013-06-18 16:00:21+00:00)
Title: Allow fallback if proxy did not authenticate user, and trusted proxy auth set

If trusted proxy authentication is on, yet the proxy did not authenticate the user, then the default authentication method is used instead of returning 'Unauthorized'. This is useful primarily in the case of single sign-on for CardDAV and GroupDAV for external clients, but still requiring the use of a password for webmail so that IMAP and SMTP can still authenticate properly.