>>>Therefore, since nobody has yet said it would be a bad idea, I'll start
>>>munging ifconfig and rtsold to use this 64 bit value...
>>	hint:
>>	link-local address gets assigned by the kernel, not by ifconfig,
>>	when interface brought up (!IFF_UP -> IFF_UP).  you just need to
>>	tweak sys/netinet6/in6_ifattach.c.
>	this should do what you wanted.

	i really don't think it right.  if you have set hostid manually,
	it should be okay to use it as is.  if hostid is set from, for example,
	pentium III CPU ID or some value used for licensing controls,
	you at least want to hide the hostid itself by MD5(hostid).

itojun