dhcpleased wants /var (but contains code to handle when it isn't there).

dhcpleased wants /var (but contains code to handle when it isn't there).
But in the nfs diskless case, we can do better by starting it a little
later.  This disrupts nfs diskless on dynamic addresses a little, if it ever
actually worked with dhclient, but anyone doing that deserves the headache.
ok florian