Do not add forward proxy to other proxies. Use new function to

create the worker that isn't by default added to the list of other workers.
This enalbles mixing forward and reverse proxy functionality on the same box.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@105070 13f79535-47bb-0310-9956-ffa450edef68