issue EVAL-WHEN-NON-TOP-LEVEL

[Jon L White <edsel!jonl@labrea.stanford.edu>]

re: A major nit (!?): Isn't there a cleanup proposal to disallow lexically
    binding special-forms in FLET, LABELS, and MACROLET?  If so, your
    EVAL-WHEN macro is doing a no-no.  You might want to change the statement
    from "suggested implementation technique" to "implemented as if".

This proposal changes EVAL-WHEN from being a special-form into being a 
MACRO [that expands into some readily-understandable(?) code].  Thus it 
wouldn't be subject to the no-shadowing-of-special-forms rule.


-- JonL --