While qvm-move and qvm-copy cannot work in dom0, their
absence is confusing. Thus, stub tools that output message
informing the user that these tools are unavailable and
qvm-move-to-vm/qvm-copy-to-vm should be used instead.
fixesQubesOS/qubes-issues#4021
Fix current EFI boot dir discovery script.
Also, adjust scripts order:
50-dracut generates initramfs in /boot/(efi/)?/$MACHINE_ID/.../initrd
80-grub2 copies it to /boot/initramfs-....img
90-xen-efi copies it to /boot/efi/EFI/qubes/initramfs-....img
Make the above order explicit, rather than relying on xen sorted later
than grub2.
QubesOS/qubes-issues#3234
