[Python-3000] atexit module problems/questions

[skip at pobox.com]

    skip> Given that sys.exitfunc is gone is there a reason to have
    skip> _run_exitfuncs?  Who's going to call it?

I should have elaborated.  Clearly you need some way to call it, but since
that is going to be called from C code (isn't it?), why expose it to Python
code?

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