Updating dox for mod_rest. Ideas expressed / clarified: 1) Making clear that mod_rest isn't to be installed under VirtualHosts AND as a component. 2) Understanding some of the implications of this choice: A) Changes to user authentication B) How it affects subdomains 3) More consistent use of domain names for clarity. 4) Using different heading sizes to show scope of section. Essentially, I added all the tidbits I had to clarify in getting this to work in my own example.

Introduction
============

This module attempts to sanitize XHTML-IM messages.

It does **not** attempt to sanitize any CSS embedded in `style`
attributes, these are instead stripped by default.

Configuration
=============

  Option                   Type      Default
  ------------------------ --------- ---------
  `strip_xhtml_style`      boolean   `true`
  `bounce_invalid_xhtml`   boolean   `false`