* sys/netinet6/icmp6.c: support DNS subject name in NI6 query.   receiving node will supress reply, if DNS subject name does not   match gethostname(3).  truncated nodename case is little bit   questionable, see below.
* sys/netinet6/icmp6.c: support DNS subject name in NI6 query.
  receiving node will supress reply, if DNS subject name does not
  match gethostname(3).  truncated nodename case is little bit
  questionable, see below.

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