* Added password field to require users to enter password when requesting a
  change of e-mail address.
* Removed reliance on HTTP_X_FORWARDED_FOR to prevent IP spoofing.
* Moved up execution of unregister_globals() before the inclusion of
  config.php to prevent information disclosure vulnerability.
* Fixed periods at the end of words not being filtered out before insertion
  into the search index.
* Force quoted text to be from the topic we're posting in.
* Implemented workaround for the IE GIF bug. See
  http://www.securiteam.com/windowsntfocus/6F00B00EBY.html