Phase 1 of mod_rewrite documentation enhancement:

Phase 1 of mod_rewrite documentation enhancement:

Adding of new information. Now especially the detailed information about how
mod_rewrite internally works which is written down here for better
understanding of the directive documentation. I've also painted two initial
figures to illustrate this better which are added to htdocs/manual/images/.

(Phase 2 will be error correction and markup code cleanup)

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@80404 13f79535-47bb-0310-9956-ffa450edef68