- <em> -> <var>

- reformatted examples (no content changes, except for a ytop)
- move the reference to mod_deflate on /top/ of the gzip example
- general markup improvement
- add short descriptions for the directives


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@97501 13f79535-47bb-0310-9956-ffa450edef68