There's a configuration option, but it doesn't work. If the group name is anything other than TWikiAdminGroup (actually, if it doesn't end with Group), it bombs.
This should be fixed. I know of a large site that has many twiki admin groups nd one called the mighty TWikiSuperAdminGroup to distinguish from the others.
Actually, it won;t affect any site that uses the name "TWikiAdminGroup", just sites that change it to something else. This is normally restricted to sites who import group definitions from another DB, such as LDAP.
It seems that r10574 has inadvertedly added two comments to lines which make
fail. I'm reverting these as they are not commented out in DEVELOP and anyway have nothing to do with this item.