[issue27213] Rework CALL_FUNCTION* opcodes

[Demur Rumed]

Demur Rumed added the comment:

Pybench is now only ~200ms slower instead of 1200ms slower. But the whole point of this patch is that CALL_FUNCTION_EX shouldn't be optimized for, so I'd much prefer real benchmarking results

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Added file: http://bugs.python.org/file43669/callfunc4.patch

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue27213>
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