RFC: add new virtual category "lisp" to ports

[mark at grondar.org (Mark Murray)]

Mark Linimon writes:
> With some recent new port additions, there are now nearly 3 dozen
> ports that could fit into a "lisp" category.  That's about the same number
> as we have in the "scheme" category, so one supposes if we have the
> one, we ought to have the other.

Looks good to me!

M
--
Mark Murray
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