Anthony Enrione authored Nov 28, 2018 and Daniel Stone committed Feb 15, 2019

Now that Weston supports the stable revision, use it. Better to excercise the
current rather than outdated protocol.

Pekka:
- split the patch, rewrote commit message
- rename xdg_shell_ping to xdg_wm_base_ping
- rename xdg_shell_listener to wm_base_listener
- rename shell to wm_base
- fix continued line alignment
- drop unrelated change of adding parentheses around bit-wise and

Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.com>