scripted jail install PR merge into 13.1

From: György Pásztor <coruscant0+freebsd_at_gmail.com>
Date: Sun, 20 Mar 2022 22:48:02 UTC
Hi,

Is there any chance that this referenced PR could be merged to 13.1-STABLE?
https://github.com/freebsd/freebsd-src/pull/473

I don't see it breaking any previous behaviour, though it could be a huge
improvement on its usability.

Thanks,
Gyu