[vdr] projects.vdr-developer.org spam cleanup

I did some spam cleanup on projects.vdr-developer.org today. There was a lot of spam in news-comments. I hope I've catched all spam, if not, please let me know.

All spam-users and inactive users which haven't created any kind content have been deleted as well.

I might have deleted some "false positives". If you are missing something, please let me know and I will try to recover it from the backup.

If your account was deleted and you can't login anymore, please let me know or just register again.

Right now registration requires manual confirmation by the administrator, until I've found a suitable solution to avoid spam users (most likely a captcha).

Tobias