1.0.0 had a NORMALIZATION argument that controls how the function is
to be applied to its arguments, defaulting to #'APPLY. This is now
called CALL-NORMALIZER, but with the original :NORMALIZATION initarg
preserved since it is used by LISP-INTERFACE-LIBRARY.

What 1.1.0 called NORMALIZATION is now called :ARGUMENT-NORMALIZER.
1.2.0 and 1.0.0 are thus incompatible with the short-lived 1.1.0.
1.2.0 is backward-compatible with 1.0.0.

NORMALIZATION is now a function from list-of-arguments to
list-of-arguments rather than a function that takes the original
function and the list-of-arguments then calls the original function.

(the original documentation was missing the key word "unless")

when a function was modified since memoization (using CERROR)

Patch originally by Ben Hyde.

Bug identified by bhyde.

It now calls a continuation instead of return a new LIST.
Therefore the new meaning of NIL is APPLY, not LIST or IDENTITY.

Thanks to Paul Sexton.