d/55xfce4-session: Inject DBUS_SESSION_BUS_ADDRESS into the session via...

d/55xfce4-session: Inject DBUS_SESSION_BUS_ADDRESS into the session via dbus-update-activation-environment.

debian/55xfce4-session

@@ -14,5 +14,9 @@ case "$BASESTARTUP" in
       XDG_DATA_DIRS=/usr/share/xfce4:"$XDG_DATA_DIRS"
     fi
     export XDG_DATA_DIRS
+    if [ -n "$DBUS_SESSION_BUS_ADDRESS" ] && \
+      command -v dbus-update-activation-environment >/dev/null; then
+        dbus-update-activation-environment --verbose --systemd XDG_DATA_DIRS
+    fi
     ;;
 esac