Recently I've noticed a couple of packages (git and util-linux) that
are creating system users and groups ("git" and "uuidd") without
explicitly choosing a UID or GID. These are then assigned IDs near the
top of the SYS_UID_MAX / SYS_GID_MAX range. Previously, such
post_install scripts were hard-coding these numbers based on
https://wiki.archlinux.org/index.php/DeveloperWiki:UID_/_GID_Database
.Is this an "official" change of direction, such that I should expect new packages will all behave this way from here out? It matters to me because this new way assigns the IDs in a way that will vary depending on what order I install packages, and that means I have to be more careful with how I reconcile the passwd / shadow / group / gshadow files between machines which would otherwise have identical lists, and especially, I need to really watch out when reinstalling a machine and then restoring /etc from backups. It's not really a "problem" per se, but I'd very much like to know what to expect here.
