Refactoring stage 2. This commit moves a large chunk of utility code out to its own function

to make reading and maintaining the actual subgroup function easier. This should just be
shuffling code around and shouldn't result in any semantic changes.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@598806 13f79535-47bb-0310-9956-ffa450edef68