Two more syntax diagrams that I'd like to use in the docs. However, I've

requested a phrasing change to the rewriterule diagram, so I'll hold off
on adding it to the doc until I hear back. These images donated by
Joseph Pecoraro.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@895072 13f79535-47bb-0310-9956-ffa450edef68