[issue11393] Integrate faulthandler module into Python 3.3

[STINNER Victor]

STINNER Victor <victor.stinner at haypocalc.com> added the comment:

> My TODO list is empty (the last item was "fix register() to be signal
> safe") so I think that the patch is ready to be commited.

As I wrote, I did some tests on FreeBSD, found bugs and fixed them. I also fixed the weird behaviour if the user sends manually a fatal signal (like SIGSEGV): it is no more ignored. And I patched test_faulthandler to not create core files. On Windows, there is still a popup warning the user a fatal error occured. I don't know how to disable (temporary) this popup.

Here is the updated patch and I hope the final patch.

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<http://bugs.python.org/issue11393>
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