* netbsd/sys/netinet/tcp_input.c: implement tcp_pullup(),   which ensures mbuf alignment match with what tcp_input() assumes.   the routine is kind of ugly because, in most architectures, 	MHLEN < ip + tcp + tcp opt   with IPv6.
* netbsd/sys/netinet/tcp_input.c: implement tcp_pullup(),
  which ensures mbuf alignment match with what tcp_input() assumes.
  the routine is kind of ugly because, in most architectures,
	MHLEN < ip + tcp + tcp opt
  with IPv6.

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