* gnus-cus.el (gnus-agent-customize-category): Removed

	* gnus-cus.el (gnus-agent-customize-category): Removed
	ignore-errors macro reference that required cl to be loaded at
	run-time.

	* gnus-range.el (gnus-sorted-range-intersection): Now accepts
	single-interval range of the form (min . max).  Previously the
	range had to look like ((min . max)).  Likewise, return
	(min . max) rather than ((min . max)).
	(gnus-range-map): Use gnus-range-normalize to accept
	single-interval range.

	* gnus-sum.el (gnus-summary-highlight-line): Articles stored in
	the cache, but not the agent, now appear with their usual face.

	* dgnushack.el (loaddir): New variable that is bound to the
	directory containing the dgnushack.el file. Use loaddir, rather
	than srcdir, to update load-path. Change lets dgnushack compile
	code in directories other than GNUS/lisp.