a/pkgtools-14.1-noarch-4.tgz
Updated removepkg, installpkg and upgradepkg to ensure that /proc is mounted,
and bail out if not. On ARM, these package tools have some optimisations
that rely upon /proc/self being available. Upgrading between Slackware
releases within a chroot, without /proc mounted, resulted in a botched update.
Thanks to Chris Newport for finding out the hard way

isolinux/*
Include the new pkgtools.