[issue40291] socket library support for CAN_J1939

[Karl Ding]

Change by Karl Ding <karl.jw.ding at gmail.com>:


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pull_requests: +19536
pull_request: https://github.com/python/cpython/pull/20248

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue40291>
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