009.04.91.28. The `00_header` script also configures terminal output and timeout settings.

Terminal and Timeout Settings:

terminal_output console
if [ x$feature_timeout_style = xy ]
then
    set timeout_style=menu
    set timeout=5
else
    set timeout=5
fi

If the `timeout-style` feature is supported, it uses a styled menu with a timeout of 5 seconds, otherwise it defaults to a simple 5-second timeout. This is important for the user to select an option out of alternatives for booting the desired kernel.