* kame/sys/netinet6/icmp6.c: fix ICMPv6 redirect input.  the bug   can result in invalid ND entry.
* kame/sys/netinet6/icmp6.c: fix ICMPv6 redirect input.  the bug
  can result in invalid ND entry.

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