SSLEngine closed already exception triggered by reload

[nginxuser2018]

One setting that I noticed mitigates the problem is to use `lingering_close
always;` however in our infrastructure this can lead to the build up of
worker processes (for the duration of the lingering_timeout).  What are the
advantages and drawbacks of using this setting?

Posted at Nginx Forum: https://forum.nginx.org/read.php?2,281786,281801#msg-281801