Aaron LI has made a whole lot of POSIXy updates to timeout(1), of which I think these two are the most informational, but there’s a bunch more if you look at the month. I’m also linking to it cause I didn’t know timeout(1) existed; never used it.
A running description of activity related to DragonFly BSD.
Thank you for posting this. By the way, The timeout(1) updates have been synced back to FreeBSD as well :P
See: https://github.com/freebsd/freebsd-src/pull/1635