Numerous enhancements and bug fixes

auto-restart-services: Skip sddm and gdm to avoid killing sessions
auto-upgrade-base: Fully automate freebsd-update following restart
auto-upgrade-base: Compute next release and use as default
auto-mark-install-from-source: Add newer/always tag to allow rebuilding even if version has not changed
auto-pkgsrc-dir, auto-pkgsrc-prefix: More robust approach
auto-software-manager: Support non-privileged pkgsrc trees
auto-pkgsrc-setup: Run auto-software-manager after setup (like desktop-installer)
auto-media-format: Option to prompt for disk label, add ext4 support
auto-fusefs-install: Add fusefs-lkl for ext4