changes include:
* a couple of coding style changes, renamed some "stats" into
"statistics", etc.
* removed the "Who's online" block from the user module.
* added db_affected_rows() to the resp. database abstraction
layers and made the statistics module use db_affected_rows()
instead.
* added update logic to "update.php".
* fixed mails not being parsed properly.
* tracker now shows user name when you view your own recent
comments.
* link to submission queue now points to the right place.
* fixed jabber module.
* theme is now activated when changed.
- applied Gerhards coding style patch.