ACPI panic on boot with new Lua loader and other minor issues

[Juan Ramón Molina Menor]

> Moreover, the "boot [kernel]" loader command does not work:
> 
> OK ls /boot/kernel.old/kernel
>      /boot/kernel.old/kernel
> OK boot kernel.old
> Command failed
> OK boot /boot/kernel.old/kernel
> Command failed
> OK boot kernel
> Command failed


I forgot that I tried starting with "unload", which seems to work, but 
does not correct the issue:

OK unload
OK boot kernel.old
Command failed