[issue11453] asyncore.file_wrapper should implement __del__ and call close there to prevent resource leaks and behave like socket.socket does.

[Terry J. Reedy]

Changes by Terry J. Reedy <tjreedy at udel.edu>:


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versions:  -Python 2.5, Python 2.6, Python 3.1

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue11453>
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