Push the trunk version of manual/rewrite/ back to 2.2 as of

r636374.

This includes added the flags document plus a few other little changes
that never got back-ported.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.2.x@636379 13f79535-47bb-0310-9956-ffa450edef68