The command line options "-shm" is used to instruct Xwayland to prefer
shared-memory for passing buffers to the Wayland server, rather than
using glamor and DRI3.
The option was there from the beginning, yet not documented in the
"-help" message.
Signed-off-by: Olivier Fourdan <ofourdan@redhat.com>
Reviewed-by: Martin Peres <martin.peres@mupuf.org>
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