0.9.13.4:

0.9.13.4:
	Explicitly disallow specializations on new-value for (setf
	slot-value-using-class), as suggested by Levente Mezaros
	sbcl-devel 2006-05-09.
	... documentation
	... internals documentation
	... also one or two other small cleanups: don't keep dfun
		information in special-case generic functions; make
		metaobject-protocol-violation an error, not just a
		condition.