Remote DNS resolution bug when using create_connection

[six-pack]

The call to sock.set_proxy inside create_connection fails to correctly pass the rdns parameter. The result is that remote dns resolution is not performed.

A workaround is to set the username to True (because the username is sent where rdns should be)

if proxy_type is not None:
    sock.set_proxy(proxy_type, proxy_addr, proxy_port,
                   proxy_username, proxy_password)

should be

if proxy_type is not None:
    sock.set_proxy(proxy_type, proxy_addr, proxy_port, rdns
                   proxy_username, proxy_password)

[six-pack]

Good work, thanks.