more formal changes:

- moved path_info section below the "enabling" section
- dropped "Using Server Side Includes for ErrorDocuments" section and added
  a simple seealso instead. I don't see, that we need a separate section to
  set a link.
- created an own subsection for every SSI element and put an overview table
  on top of it, this resolves also the mozilla problem with nested <dl>s,
  that was still present (sometimes)
- fixed some typos
- markup.

content changes:
- added a note about the behaviour of fsize/flastmod virtual
- removed apache 1.2 compatibility notes (this is a 2.x documentation)
- added a compat note in the module overview table
- added description for QUERY_STRING_UNESCAPED
- splitted flow control descriptions (=, != vs. <, <=, >, >=; the former
  allow regexps, the latter don't)
- added a sentence and an example about regexp capturing
- mentioned the literal comparison (vs. numerical)
- includesNOEXEC allows only text/* ressources to be included.
  mentioned that.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@97535 13f79535-47bb-0310-9956-ffa450edef68