Comment 4 for bug 101740

Up to now, following a statement of Infrae sometime in the past, at ETH we do
not officially support nested acl_users. There were some efforts in the past
with a "satellite acl_users", but the work on that has been dropped.

However, it should have been fixed in the past, that in a situation with one
acl_users in Silva Root any user can change his user settings. Can we trust on that?