PR 39313: allow the user to configure which rules come first when RewriteRules

are merged with RewriteOptions Inherit.

Submitted By: Jérôme Grandjanny <jerome.grandjanny cea.fr> 
Reviewed By: covener


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1042255 13f79535-47bb-0310-9956-ffa450edef68