Regarding the #define unix stuff:  I think we can probably drop it.
I thought there was a lot more dependence on the pre-defined symbols
than there is.

Besides, with the .mk files, you can always stuff in -Dwhatever as
necessary.

[for default behaviour].

Sorry for the can of worms (again).  At least this can was smaller than
the last one (in terms of nworms).

		    (*u = --*greywolf)->u_flags |= U_CRUNCHY;
		    u->u_sleep = 3 * 60 * 60;