- fix examples: turn example.isp.com to domain.example.com

  (isp.com is really a bad choice, YMMV)
- add "none" to syntax descriptions and fix defaults
- fix several <directive>s
- add infos the descriptions of *IP directives
  (redundant, but to reach more clearness)
- add section ids
- fix some typos


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@96892 13f79535-47bb-0310-9956-ffa450edef68