When using '--update', warn that you cannot use 'vm-start' to start the VM!

vm-setup

@@ -256,5 +256,18 @@ else
 fi
 
 echo "OK"
+
+if [[ ${UPDATE} == 1 ]]; then
+  cat <<EOF2
+
+*****************************************************************
+
+Do not start the VM with 'vm-start', just use the VirtualBox GUI.
+
+*****************************************************************
+
+EOF2
+fi
+
 echo
 exit 0