ipv6 addresses on loopback broken

[Li, Qing]

>
> It looks like IPv6 addresses bound to loopback interfaces no longer
> work.
>

  Please apply patch

     http://people.freebsd.org/~qingli/qing-ipv6-patch-9-5-1100.diff

  and let me how it works. In the meantime, I will do more testing
  on it.

  Thanks,

  -- Qing