0.8.2.8:

0.8.2.8:
	MacOS/Darwin merge.  Points to note:
	... thanks to Patrik Nordebo, Pierre Mai and Brian Mastenbrook;
	... mmap()ed simple-streams appear not to work under darwin;
	... floating point traps are currently non-functional on both ppc
		platforms;
	... on darwin, hitting ^C, then choosing CONTINUE results in a
		memory fault;
	... there's no lchown under darwin;
	... x86/bsd building is also slightly non-functional currently;
	... There's a OAOOM problem in src/compiler/ppc/c-call.lisp, and in
		src/runtime/ppc-assem.S.