Improve fluency of tip

When reading the tips (hovering above entries in the "Diaspora Pod" column) I stumbled upon a broken sentence regarding IPv6 availability.

I changed "has IPv6 [yes/no]" to "[has/does not have] IPv6" which fits better.

In my opinion those tips should be readable -- not parseable -- in the first place.

Also, I'd like to add that an IP address does not "have" IPv6. The current formulation is a bit clumsy as I see it. Maybe state something like "it [does/does not] provide IPv6 access".