Changing Bugzilla settings so a single person can't confirm bugs by "popular vote"

[Kai Blin]

Hi folks,

While working on bug 9405, I realized that all 20 votes on that bug were made 
by the reporter. I think that's pretty lame, so I've asked the bugzilla folks 
if there's a way to fix that. They said that the settings should be obvious 
when editing the product. Can we please fix that?

Cheers,
Kai