Updating the MPE DSO code to be compatible with an OS patch fixing an
  earlier DSO problem.

  Refining how MPE deals with UID/GID management and dealing with some MPE
  limitations in this area.

  First-time support for mod_proxy.

  #include tweakage required for using apxs to build modules without access
  to the full source tree.

  Other minor tweaks.

PR:            6587
Obtained from: <87FB8F5CE210D311B60500A0C9F4871C073DA372@xcup01.cup.hp.com>
Submitted by:  [Mark Bixby <mark_bixby@hp.com>]
Reviewed by:   William Rowe


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@86348 13f79535-47bb-0310-9956-ffa450edef68