[issue31927] Fix compiling the socket module on NetBSD 8 and other issues

[Serhiy Storchaka]

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


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keywords: +patch
pull_requests: +4202
stage:  -> patch review

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue31927>
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