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'. To change or set the superuser manually, edit the file
conf/local.php and change the setting
$conf['superuser'] to the username of the user(s) who are designated superuser.