Add the option to disable sshuttle ipv6 support
Add the option to disable sshuttle ipv6 support

Using --disable-ipv6 will now force sshuttle not to capture
ipv6 traffic, even if the client supports ipv6.

sshuttle/sshuttle,apenwarr/sshuttle,apenwarr/sshuttle,sshuttle/sshuttle