Some testing around the immediate effect of approving users needs to be done.
The MoinMoin 1.8.x API allows users to be added to groups for immediate effect,
but the API in 1.9.x is more complicated. This may well affect mod_wsgi and
other "persistent server" deployments, not CGI.

(Permit the approval of users when approving their edits. The user will be added
to the ApprovedGroup if the reviewer indicates that they should henceforth be
considered as a trusted user in the Wiki.)
