Proscription list and ban/unban/bans commands to manipulate it. The server will throw some errors the first time it starts after this update, don't be alarmed - it just can't find the proscription file. It will create a new one the first time you ban someone. Ban command takes a wildcard IP match and a reason, but makes no attempt to validate that your wildcard IP is actually a valid ip. Does not actually filter new clients yet.