Introducing XML docs for the 2.0 misc section. Also fixed some XML/DTD issues

and added appropriate 'warnings' about their age and up-to-date-ness.

Submitted by: Luiz Rocha <lsdr@lsdr.net>


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/APACHE_2_0_BRANCH@98877 13f79535-47bb-0310-9956-ffa450edef68