kern/54118: Support POSIX_SPAWN_SETSID

[andrew.cagney%gmail.com@localhost]

>Number:         54118
>Category:       kern
>Synopsis:       Support POSIX_SPAWN_SETSID
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          change-request
>Submitter-Id:   net
>Arrival-Date:   Fri Apr 12 19:55:00 +0000 2019
>Originator:     Andrew
>Release:        NetBSD 8.0_STABLE
>Organization:
>Environment:
NetBSD 8.0_STABLE
>Description:
GLIBC extended posix_spawn() to include POSIX_SPAWN_SETSID which calls setsid() between the 'fork()' and 'exec()'.

Should it be added?

>How-To-Repeat:

>Fix: