stage-pool/dest-install-pkg-build@.sh: hardcode CPU arch.
stage-pool/mnt-system-apply.sh: also restart systemd-sysctl.
stage-data/dest-install-pkg.sh/pkglist: do not install faience-icon-theme.
stage-list-pool/0-prepare-host/2-mnt-system-install: install only archlinux configs.
stage-pool/dest-hier-infer-boot.sh: remove (superseded by stage-pool/util-hier-infer-drive@.sh).
stage-list-pool, stage-list: split 1-prepare-dest into 1-create-dest and 2-prepare-dest.
Rename main files for consistency.
Add helper-symlink-stages.sh: a sourcable file to help symlinking stages from pools to lists.