Is the auto parameter of the worker_processes directive planned to support the Docker runtime?

[agile6v]

Hi, Maxim Dounin

I submitted a patch that supports the auto parameter of the worker_processes
directive to detect the container environment automatically. Refers to the
JDK implementation: https://bugs.openjdk.java.net/browse/JDK-8146115

If you have time please review it. Thanks.

Posted at Nginx Forum: https://forum.nginx.org/read.php?2,279418,279565#msg-279565