[issue1571878] Improvements to socket module exceptions

[Sandro Tosi]

Changes by Sandro Tosi <sandro.tosi at gmail.com>:


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nosy: +sandro.tosi
versions: +Python 3.3 -Python 3.2

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue1571878>
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