clear sin6_scope_id after in6_embedscope. the previous code actually did not cause a trouble, but it is still correct to clear the field.
clear sin6_scope_id after in6_embedscope.
the previous code actually did not cause a trouble, but it is still
correct to clear the field.

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