backends/x11: Restore dedicated XRenderUtils::init function
Under kwin_wayland kwinApp()->connection()
is for communicating with
XWayland, but in X11Windowed backend we need to talk to the host XServer.
Restore XRenderUtils::init
and set it accordingly based on
whether we're running standalone or windowed, so that kwin_wayland
works running nested in an X session again.
Kai Uwe Broulik kai_uwe.broulik@mbition.io on behalf of MBition GmbH
https://github.com/mercedes-benz/daimler-foss/blob/master/PROVIDER_INFORMATION.md