[antlr-interest] public sign-up off on the wiki

[Terence Parr]

Hi, I had to turn off public sign-up of new users because some jerk  
was signing up with a bunch of spam usernames.  If you would like to  
be a user of the wiki so that you can add content, please e-mail me  
and I will add you.  I need your full name and e-mail address.

Thanks,
Ter