[issue12306] zlib: Expose zlibVersion to query runtime version of zlib

[Torsten Landschoff]

Changes by Torsten Landschoff <t.landschoff at gmx.net>:


Added file: http://bugs.python.org/file22308/zlibversion_py3.diff

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue12306>
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