Use &aux definitions in defmfun; clean up foreign-friendly definitions
Add &aux to defmfuns to that e.g. array arguments can optionally take a size and make an array (bessel.lisp). Remove several unused definitions in foreign-friendly held over from ffa. SBCL 64: TOTAL: 1223 assertions passed, 5 failed, 0 execution errors. CCL 64: TOTAL: 1228 assertions passed, 0 failed, 0 execution errors.
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