pkg 1.20.9

From: Baptiste Daroussin <bapt_at_freebsd.org>
Date: Mon, 13 Nov 2023 14:07:37 UTC
Hello everyone,

The new pkg 1.20.9 includes 2 features useful for pkgbase:
- reduction of the number of .pkgsave files there are created, now
  only the files that really needs to be looked at are backed up,
  This should ease transition to pkgbase.
- @override_keyword, this is a new keywork for pkg plist, this is intended to be
  used in order to be able to provide a FreeBSD-src package which will be
  created along with other packages, so that one can:

  $ pkg install FreeBSD-src

Enjoy,
Bapt