Provide basic coverage for the existing options, nothing deeper (e.g.,
pipe closing behavior) is tested in this set.
Reviewed by: allanjude
Feedback from: des
Sponsored by: Klara, Inc.
Differential Revision: https://reviews.freebsd.org/D42714
This will make a number of things easier in the future, as well as (finally!)
avoiding the Id-smashing problem which has plagued developers for so long.
Boy, I'm glad we're not using sup anymore. This update would have been
insane otherwise.