support latest-iso, wait longer before entering passwd

[yoosefi]

Freaking awesome, man! I'd love to get the latest ISO, though (the one in your JSON expired and is no longer in distfiles.)

I just edited the files manually and had to increase the SSHD wait time and retype the passwd and start commands because it typed over the boot sequence. Can this be tied to a log event so there isn't a race?