-fix for Windows DNS Server use.  Ignore Link Local DNS Server entries:

// Source: http://comments.gmane.org/gmane.network.dns.c-ares/1090
// Windows implements a draft RFC from 2001
// (http://tools.ietf.org/id/draft-ietf-ipngwg-dns-discovery-03.txt) that
// suggests that DNS resolvers try a couple of fixed "site-local" IPv6
// addresses (fec0:0:0:ffff::1, fec0:0:0:ffff::2 and fec0:0:0:ffff::3), which
// would allow the networking stack to find DNS servers without any
// configuration. 

// The whole concept of site-local addresses is now considered problematic and
// the use of the fec0::/10 address range has been officially deprecated in RFC
// 3879 (http://www.ietf.org/rfc/rfc3879.txt) so it seems unlikely that this
// way of setting up DNS on a network will become popular in the future.

git-svn-id: https://svn.resiprocate.org/rep/resiprocate/main@11009 ddefafc4-47db-0310-ae44-fa13212b10f2