0.7.6.23:

0.7.6.23:
	merged APD patch for bugs 191-b (making gf lambda lists
		conform to ANSI 3.4.2) from sbcl-devel
	added tests, and fixed old tests whose brokenness is now
		detected
	(speculated about reusing SB-C:PARSE-LAMBDA-LIST instead of
		adding new PROCESS-LAMBDA-LIST, but didn't actually
		actually do that, in favor of checking in something
		that works and fixes a bug. Maybe next version...)
	reverted handling of illegal function name in DEFGENERIC
		(from previous commit) since I guess it should be
		PROGRAM-ERROR after all