- some code cleanups

- some code cleanups
- fix for the client caching code (cache is flushed after modifications
  rather than removing only the changed entry)

The code was submitted by Jeff Costlow <j.costlow@f5.com> under the
following terms:

Copyright 2002, F5 Networks, Inc, All rights reserved.
This software is not subject to any license of F5 Networks.

This is free software; you can redistribute and use it
under the same terms as OpenLDAP itself.