0.8.5.3:

0.8.5.3:
	CLISP minor issues:
	... fix float-related bug: since CLISP doesn't support
		denormalized single-floats, we need to construct
		LEAST-POSITIVE-SHORT-FLOAT explicitly
	... we need to perform a similar trick for BOOLE as we already
		do for BYTE.  Rewrite the horrible package hackery to be
		slightly more robust, in mitigation for the perpetuation
		of this horror.