[issue1739468] Add a -z interpreter flag to execute a zip file

[Paul Moore]

Paul Moore added the comment:

PJE's patch looks OK. I agree with Nick that the chain of &&s in 
PyImport_GetImporter should be expanded into a chain of ifs. As it 
stands, the code is needlessly obfuscated.

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<http://bugs.python.org/issue1739468>
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