A VNC viewer that resizes the guest framebuffer makes the console font
unreadable to OCR, which stranded the bootstrap at its login-prompt gate.
Getty is reliably on the spare TTY and SSH coming up is the real success
signal, so type the login blind and retry the whole sequence up to three
times; a failed pass just leaves getty re-prompting.
Also print the resize-safe viewer invocation whenever a VM starts: a
resize during early boot can wedge virtio-gpu before the system is up.
Ryan Hughes
100a41f7fd