[issue2953] _zip_directory_cache untested and undocumented

[Tarek Ziadé <report@bugs.python.org> at psf.upfronthosting.co.za]

Tarek Ziadé <ziade.tarek at gmail.com> added the comment:

> Does distutils use _zip_directory_cache in any way?

Not at all. But pkgutil does, and uses to get a dirlist,
so I guess a new API should be created in zipimport to handle this case
as well. (I think it's some setuptools code originallyt, that landed in
pkgutil)

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