* nodeinfod: support IPv4 node addresses. * sys/netinet6/icmp6.c: do not respond to IPv4 node addresses query,   with a bogus packet.
* nodeinfod: support IPv4 node addresses.
* sys/netinet6/icmp6.c: do not respond to IPv4 node addresses query,
  with a bogus packet.

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