External authentication via REMOTE_USER
|Reported by:||andi||Owned by:|
Using the REMOTE_USER variable for authentication is necessary to use http authentication methods other then 'basic' provided by the web -server such as "Kerberos" or "Digest".
Attached patch adds a plugin that just uses REMOTE_USER as login.
On its own, this plugin is not actually useful because roundcube normaly needs the users plain password to authenticate against imap/smtp/sieve/ldap. I will open some more tickets for patches to implement SASL proxy authentication for those services.