
Rename the build option to "deprecated-backend-fbdev" so that a previously configured build dir doesn't retain the old setting. This is consistent with the existing "deprecated-wl-shell" option. Make the option default to "false". Print a warning when fbdev is force-enabled. Signed-off-by: Simon Ser <contact@emersion.fr> References: https://gitlab.freedesktop.org/wayland/weston/-/issues/581