[issue38712] add signal.pidfd_send_signal

[Benjamin Peterson]

Change by Benjamin Peterson <benjamin at python.org>:


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keywords: +patch
pull_requests: +16579
stage:  -> patch review
pull_request: https://github.com/python/cpython/pull/17070

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue38712>
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