New spam protection

Just a quick note that I have installed a new level of spam protection which will hopefully keep some of the registration bots away for a few weeks.

While my change did bring automatic registrations through forum bots to zero at least two others made their way through the security walls. I presume they’re using manual registration, something there is no cure whatoever against.

Please disregard their postings on the RSS feed, we’ll delete their postings and user accounts as soon as we spot them.