[PATCH xserver] Xephyr: Require xcb-shm version 1.9.3 or newer

[Adam Jackson]

On Wed, 2018-02-07 at 14:08 +0300, Alexander Volkov wrote:
> It's needed for FD-passing.
> 
> Signed-off-by: Alexander Volkov <a.volkov at rusbitech.ru>

Merged, thanks:

remote: I: patch #203162 updated using rev 8510f542e5474b719f7d7edba7ef0cc05af0271e.
remote: I: 1 patch(es) updated to state Accepted.
To ssh://git.freedesktop.org/git/xorg/xserver
   2ff6eaad8..8510f542e  master -> master

- ajax