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functions that return nonstandard extra values

On the bright side, the existence of a standard helps system maintainers
to resist users continually asking for changes to the language that
have but minor benefit, such as this gethash thing. With only
a minor change in efficiency the user could store (CONS <key> <value>)
in the hash table, and get what he wanted, the EQ'ified key and
the value. If a user was really interested in efficiency he wouldnt
use the hairy system-provided hash table implementations anyway.