Mark insecure mesh clients

src/freedombone-image

 
 if [[ $VARIANT == 'meshclient' || $VARIANT == 'meshusb' ]]; then
     IMAGE_NAME=$'meshclient'
+    if [[ $INSECURE != 'no' ]]; then
+        IMAGE_NAME=$'meshclient-insecure'
+    fi
+
     if [ ! $IMAGE_SIZE_SPECIFIED ]; then
         IMAGE_SIZE=7.8G
     fi