Fix a bug introduced during the directory_walk() optimizations most recently

checked in.  Includes a rewrite of core_reorder_directories, and removes
some cruft code from {directory,file,locaiton}_walk.

Reviewed by:	Rob Hartill


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@78984 13f79535-47bb-0310-9956-ffa450edef68