[rbldnsd] Disabling ipv6-specific tests

[Michael Orlitzky]

On 07/31/2013 07:20 PM, Jeff Dairiki wrote:
> 
> Aha!  That's the real error.  The "exception in ...  __del__" error was
> a red herring.
> 
> It turns out the pydns library (starting with 2.3.6 — I've been using
> 2.3.4) has changed how it signals "connection refused" errors.  The
> the relocation of the sleep() from the top to the bottom of the retry
> loop in my "Fix typo" commit (29b5750) exercised the problem.
> 
> I've just pushed a fix:
>    https://github.com/dairiki/rbldnsd/commit/0c1a5e4
> 

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