add the tg anon3 amendment for ban appeals

[Frank_Stein]

Just PM the admins if you find something like that.

There was this one ban appeal where I thought there was something relevant worth pointing out even though I wasn't involved, and I tried this and found out there's a lot of admins that have pm's deactivated.

I kinda think it might be worth allowing comments on ban appeals, but maybe have them all require approval before actually appearing in the thread, with the caveat that wasting admin time with bad posts still be a punishable thing