[issue14061] Misc fixes and cleanups in archiving code in shutil and test_shutil

[Serhiy Storchaka]

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


Added file: http://bugs.python.org/file45466/shutil_make_archive_misc_3.patch

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<http://bugs.python.org/issue14061>
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