almost working

fix-raspian-defaults/rc.local.txt

@@ -0,0 +1,10 @@
+#!/bin/sh  # can't assume bash yet
+
+if [ ! -d /boot/root ]; then
+    logger -s -t rc.local.txt cant find root overlay in /boot
+else
+    rsync -avP /boot/root/ / && \
+    rm -rf /boot/root /boot/rc.local.txt # we only need to run once
+fi
+
+reboot