HTML posting permissions + secondary groups

http://forums.coders...ndpost__p__3834

The issue here is that the decision on whether to parse HTML code is done at display time, and the tutorial will obviously be viewed by any number of people.  What I had been doing was simply looking at the group_cache value of the author and seeing if he could post HTML in articles.  But if the author's primary group doesn't let him post HTML, and his secondary group does, my original code won't catch that, I have to switch it to the code posted there.

This fix works, but I want to go through my code and look for other places that I might have been doing the same technique.