allow a user to specify an IPv6 scoped address using ipngwg-scopedaddr-format-01. (blindly merged from fbsd2, not compiled)
allow a user to specify an IPv6 scoped address using
ipngwg-scopedaddr-format-01.
(blindly merged from fbsd2, not compiled)

MarginC/kame,MarginC/kame,MarginC/kame,MarginC/kame,MarginC/kame,MarginC/kame,MarginC/kame