Add in the UseCanonicalPhysicalPort directive, which

basically allows Apache to configurably ( :) )
use the physical port when constructing the
canonical port. Also add the exact ordering to
the docs, so people can easily see how it works.
We now have compatibility with both 2.0 and 1.3.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@344369 13f79535-47bb-0310-9956-ffa450edef68