This is part three.

It fixes the misunderstandings between local URL paths and local
system paths. Note that mod_rewrite handles _both_.
Fixed also some comments to make the explanations more clear.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@98783 13f79535-47bb-0310-9956-ffa450edef68