A customer requests that the Directory Browser sort with uid as first key, or
make sort order configurable.  The reason is that the label it displays for
entries is always the RDN; they have entries with uid as the RDN, but the
Directory Browser uses cn as first sort key, so even though the entries can be
considered to be sorted, the list looks wrong since the uid is displayed.

I think it makes some sense to use uid as the first sort key since the
New->Person template uses uid as RDN.