Check, that only the desktop-shell client spawned by the compositor
(desktop-shell plugin) is allowed to bind to desktop_shell interface.
Other clients will receive an error like:
wl_display@1.error(desktop_shell@20, 0,
"permission to bind desktop_shell denied")
The error has the proper object id and interface type.
Note: desktop-shell cannot be started manually anymore, it has to be
started by the compositor automatically.
Signed-off-by: Pekka Paalanen <ppaalanen@gmail.com>
bbe605241d