[GDB Wiki] Add editor privilege control

[Joel Brobecker]

> > If we were getting multiple spams per day, limiting to registered
> > members would make sense, but right now it doesn't seem necessary.
> 
> Yeah, I guess it's a question of what threshold of spam needs to be
> crossed before we take this step.
> I'm ok with taking the step.  I don't have a strong opinion on whether
> now is the time.

Neither do I, so I will not push the idea further unless it starts
gathering a little more support.

Thanks for the feedback, All!

-- 
Joel