[273,3] lun.c - routines to manage LUNs in an rsx decus-c application

		No longer a mess, but still not useful I think.
		Many conceptual bugs. I hope the interface will
		be stable, but the guts WILL be rethought. Maybe
		what I want to do is "unnatural" for RSX.

LUN		Manages the LUN resources of a task.
		LUNFIX()	begin, internal
		LUNATTACH(dev)	Allocate, return Lun #
		LUNDETACH(lun)	Free up Lun
		LUNRESERVE(lun)	Note we may not use said Lun

GETBIT.C	Extract bit from vector
PUTBIT.MAC	Force bit into vector. "C" version won't compile straight.

LUN.OLB		Library of LUN things to build against.

LUNTST.C	Tests above.



A Note from BRU (No not that confounded DEC [f]utility)

A lun allocation package, the fits in with the DECUSC C library, has been
submitted by Bruce Cook. This is probably a better solution, though the
function names may not be appropriate. 
