Feature: Quit cage option. (an key combo to quit cage)

[Bram-diederik]

Is it posible to add a quit option to cage?
like good old ctrl-alt-backspace on X.

I automatically open a vnc connection when i login to tty12 on my laptop.
i would like to have a option to logout. (exit the program)

with systemctl start getty@tty12
.profile

if [[ "$(tty)" == "/dev/tty12" ]]; then
    exec cage -s --  vncviewer fasterPC:5901 
    exit
fi