DPB, DPBS, something like that

[David C. Plummer <DCP@QUABBIN.SCRC.Symbolics.COM>]

When writing system code especially, but sometimes when writing normal
code, I have often had to write long chains of DPBs, such as
	(dpb val1 spec1
	     (dpb val2 spec2
		  (dpb val3 spec3
		       ...)))
This (a) gets tedious and (b) looks bad.  I would either like to extend
DPB to take an odd number of arguments, or have a new function which
does.  (It probably wants to be a function rather than a macro.)  Thus,
	(dpb val1 spec1
	     val2 spec2
	     val3 spec3
	     ...
	     background-integer)
Have others had a need for this and would find this generally useful?