If ipv4+icmp6 or ipv6+icmp packets were embedded into an icmp payload, we missed to drop them.  While there, also add a reason to the corresponding check in pf_test(). ok mcbride@ claudio@
If ipv4+icmp6 or ipv6+icmp packets were embedded into an icmp
payload, we missed to drop them.  While there, also add a reason
to the corresponding check in pf_test().
ok mcbride@ claudio@

orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars