DNM - New Vouch Model

Unknown is more correct... if we don't have a voucher, we don't know what the source of the vouch is. Known autovouches are always Dino McVouch. If people delete their accounts, or previously have in the past, that produces vouches with no voucher. We probably want to change this up somehow so we don't have so much data loss built-in, but that's the current state of things.