[issue1567] Patch for new API method _PyImport_ImportModuleNoLock(char *name)

[Guido van Rossum]

Guido van Rossum added the comment:

Can you produce a version of the patch that applies cleanly to 2.6? Then
we can apply it there first and merge into 3.0 later.

But I wonder.  It seems this changes every single call to
PyImport_ImportModule() in the core to _PyImport_ImportModuleNoLock(). 
What's the point of the lock at that point?

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