pub fn start_cu_server(bind: &str)Expand description
Start the CU server on bind: a bare port listens on all interfaces (the
container-deployment default), host:port scopes it. Guarded so that exactly
one server binds per process no matter how many call sites (module import,
Wayland compositor init, the selkies setting) race to spawn it; backend
selection stays per-request, so a server bound at import serves a compositor
that only starts later.