Rearrange the main doc index a little. In particular:

- Change the title of the right hand column to "Users' Guide"

- Move "Other Topics" to the left hand column.

- Move some items back and forth between the reference section
and the guide section.  This is all rather arbitrary.

- Alphabetize the users' guide section

- Force left alignment for the silly browsers that carry div alignment
into tables


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@95585 13f79535-47bb-0310-9956-ffa450edef68