Specifies who has superuser rights in DokuWiki. Superusers always have all permissions regardless of ACL restrictions and are allowed to edit ACL restrictions (think root).
You can set either a username, a list of usernames (“admin1,admin2”), or the name of a group by prepending an @ char to the groupname. If you run the DokuWiki installer and choose to enable ACL, this setting will be '@admin'.
!!not set!!
Danger: Changing this option could make your wiki and the configuration menu inaccessible.