[issue18806] socketmodule: fix/improve setipaddr() numeric addresses handling

[Charles-François Natali]

Changes by Charles-François Natali <cf.natali at gmail.com>:


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resolution:  -> duplicate
stage:  -> committed/rejected
status: open -> closed
superseder:  -> socket.gethostbyname incorrectly parses ip

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue18806>
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