30465bdca6
Migrate the x11 frontend to use the new head-based output configuration API: listen for heads_changed, and process all heads. Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk> Reviewed-by: Ian Ray <ian.ray@ge.com> Reviewed-by: Daniel Stone <daniels@collabora.com> Acked-by: Derek Foreman <derekf@osg.samsung.com>