Exploit fix 0.1

[RoLex]

Hmm. Little late maybe, but who said that start position has to be 0 and amount of requested bytes -1? DC++ will accept any start position >= 0 and any size that is -1 or >= 1 bytes. Same goes for the ZLib extension, ZL1 flag is optional, in fact my clients might not support ZLib at all. This script will totally fail.