Find all config.m4 files when building generated_lists. Also, convert

the sort to use 'sort -n -b'.  These arguments are specified by single
unix, so they should be portable.  This restores the ability to order
the config.m4 files.
Submitted by:	Dale Ghent <daleg@elemental.org>


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@87555 13f79535-47bb-0310-9956-ffa450edef68