a503e86615
This lets us avoid a few command line options. Also, we're to need it for setting the XWayland path, which isn't available as a command line option. Reviewed-by: Eric Engestrom <eric@igalia.com> Reviewed-by: Valentine Burley <valentine.burley@collabora.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/36026>