See https://moodle.org/mod/forum/discuss.php?d=317353 for the discussion on this.

I feel that we should move the following plugins to the plugin repo with, or without a maintainer:

1. auth_fc (FirstClass)
   1. lack of testing resource availability at HQ
   2. I imagine that few people still use FC any longer
2. auth_nntp (Network News Transfer Protocol)
   1. Probably rarely used these days
   2. We don't test at HQ (though we technically can)
3. auth_pop3 (POP3 Mail server)
   1. Probably rarely used these days
   2. We don't test at HQ (though we technically can)
4. auth_imap (IMAP Mail server)
   1. Probably rarely used these days
   2. We don't test at HQ (though we technically can)
5. auth_pam
   1. Probably rarely used these days
   2. We don't test at HQ (though we technically can)
   3. Requires a PECL module be installed. Without the module installed in it's current state if the plugin is enabled, this causes WSOD + 500 issues when an unknown user tries to login. We aren't able to add this to our environment checklist because it will require for all of Moodle unnecessarily.