rootless+cgroup2+systemd: improve error message when dbus-user-session is not installed by AkihiroSuda · Pull Request #3186 · opencontainers/runc

Wrap the error with "failed to connect to dbus (hint: for rootless containers, maybe you need to install dbus-user-session package, see https://github.com/opencontainers/runc/blob/master/docs/...