0.8.10.43:

0.8.10.43:
	Use SYMBOL-HASH to cache SXHASH values for symbols
	... believe it or not: delete various reader conditionals,
		special-case code, etc.
	... one new VOP needed per-backend: implement on alpha, hppa,
		mips and sparc;
	... add some boilerplate;
	... unimplemented on ppc.  This will break the build, so with
		luck it won't be too long before an enterprising user
		implements it.