* kame/sys/netinet6/natpt_trans.c (translatingICMPv4To6): - Hop limit of translated IPv6 packet uses ttl of original   IPv4 packet, so that a hop limit is decremented in   ip6_forward().
* kame/sys/netinet6/natpt_trans.c (translatingICMPv4To6):
- Hop limit of translated IPv6 packet uses ttl of original
  IPv4 packet, so that a hop limit is decremented in
  ip6_forward().

* kame/sys/netinet6/natpt_trans.c (tr_icmp4MimicPayload):
- Correct UDP port number stored in ICMP_UNREACH packet
  returned from IPv4 network.  It was not enough in the change
  that I put in 09 Jun 2001.

  Now, KAME NAT-PT can process traceroute6 from IPv6 host to
  IPv4 host.

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