bindwithin now respects protocol
Disable condor_sockaddr::convert_to_ipv6

I don't think we have a need for IPv6-v4-mapped addresses, so this is a
landmine of potential confusion.
Unify sorting addresses, fix name-less hosts

Also, link local IPv6 addresses are the worst ranked, since they're
nearly useless to us.
Merge branch 'master-4494-mixed-mode-submit' of /p/condor/repository/CONDOR_SRC into master-4494-mixed-mode-submit