[issue26032] Use scandir() to speed up pathlib globbing

[Serhiy Storchaka]

Changes by Serhiy Storchaka <storchaka at gmail.com>:


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components: +Library (Lib)
dependencies: +File descriptor leaks in os.scandir(), regular files handled as directories in the glob module
versions:  -Python 3.5

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue26032>
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