[List] hashes and sizes of clean wz files, so you can know if yours are corrupted

If the hashes don't match to what the server says it should be, give an error.

Just another thing to bypass... anything the client sends to the server can't be trusted in the first place, people would just hack their client to send the correct hashes regardless what files they were using.

If it weren't for the fact that they actually distributed a bad map.wz, I'd say the current server side autoban detection of changed maps was fine >_>