corrected the logic of whether to pass received dst opt/routing headers to a user in ip6_savecontrol().
corrected the logic of whether to pass received dst opt/routing headers
to a user in ip6_savecontrol().

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