[rbldnsd] Disabling ipv6-specific tests

[Jeff Dairiki]

On Thu, Aug 01, 2013 at 11:31:11AM -0400, Michael Orlitzky wrote:
> Awesome, it's working. With that out of the way, there's another small
> problem =)
> 
>   >>> import socket
>   >>> socket.has_ipv6
>   False
>   >>> s = socket.socket(socket.AF_INET6, socket.SOCK_DGRAM)
>   >>> s.close()
> 
> I think that will catch the missing kernel support (I haven't made it
> that far yet), but it doesn't look like it works for python. This should
> work though:
> 
>   -    no_ipv6 = Rbldnsd().no_ipv6
>   +    no_ipv6 = Rbldnsd().no_ipv6 or not socket.has_ipv6

Oof.  Who knew that you could create an ipv6 socket without has_ipv6?
I guess I should have listened to you in the first place...

Hopefully this fixes it:
   https://github.com/dairiki/rbldnsd/commit/087e1a1

Jeff