Make autologin optional and show journal output instead

[e-minguez]

Once booted an image with 0.5, it is autologged as root by default:

I'm not sure if this is a good idea or if it will be better to just dump the "journalctl -f" output instead and perhaps make autologin optional or in another tty.

[rdoxenham]

Great suggestion, @e-minguez -- this is exactly what I type (journalctl -f) when I am watching an install!