stage-pool/mnt-system-apply.sh: perform systemd reexec and reload.
profiles/main: pkglist{,-build}: another cleaning pass; explicitly require all of Wine's optdepends.

I don't know why just Wine and not "every optdepend possible". I'm being
inconsequential.
Revert "profiles, configs: merge cpu-arch-* into main; rip out the former."

This reverts commit a6d2a27ca0b8b994667af5f3950fcb0b486ca213.

Actually, we cannot do that. lib32 packages get in our way.