[New-bugs-announce] [issue6132] Implement the GIL with critical sections in Windows

["Martin v. Löwis"]

> Obviously we can't just slap on a critical section and call it done,
> unless nobody cares about changing what threading.Lock does.

This isn't obvious to me. I do care about what threading.Lock does,
but still fail to see why we can't just slap on a criticial section
and call it done.