[issue10883] urllib: socket is not closed explicitly

[Nadeem Vawda]

Nadeem Vawda <nadeem.vawda at gmail.com> added the comment:

Updated patch with fixed refcounting mechanism. Also fixes clear_cache() in
CacheFTPWrapper to leave the cache in a consistent state for subsequent use.

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Added file: http://bugs.python.org/file22609/issue10883-v2.patch

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