Add SNI test hostname

This will match the star-cert (or unified for non-SNI clients),
and be real in DNS, but not be a name anyone actually cares about
in the public namespace.

< _joe_> or again, add a bogus entry to the dns for pinkunicorn.wikipedia.org and point it to the correct ip

Change-Id: Ib05d889812254da799f93ee21aeb196a39bb92dc