Two additional user classes - Banned & Custom

The banned user class is not permitted to enter the chat regardless of
the chat's open/closed status. This could be set to a forum's default
banned group to deny them access to the chat.

The additional custom user class mirrors the standard user class
permissions, but permits distinctive username colours via CSS edits.
Example would be VIP group, contributors, etc standing out from standard
users.

To utilise these two additional user classes some editing to your
forum's respective CustomAJAXChat.php file would be required.