[developers] compiling rms in sbcl

[Stephan Oepen]

> I think you should give oe a chance to look too, though.

nice work on the SBCL front, ben.  please go ahead and check in your
changes.  i should try to tidy up a little in the LUI neighborhood.

specifically, which SBCL version (in terms of architecture and OS) are
you using?  and what about harold?  if you two sent me the output of

  (pprint *features*)

i can probably generalize a little more in `sbcl-patches.lisp'.

                                                       cheers  -  oe

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