boxtools on raspberry pi

- rename to_system to apu_system / cm3_system /cm4_system
- fixes in router
- firewall may be switched off
- firewall is a parameter of router, also used when no routing is configured.

to_system/etc/profile.d/welcome.sh

@@ -1,13 +0,0 @@
-export EDITOR=nano
-echo "-----------------------------------------------------"
-echo "Welcome to $HOSTNAME $(hostname -I)"
-echo "ethernet addr $(cat /sys/class/net/eth0/address)"
-function service_status () {
-    for name in $@; do \
-      enabled=$(systemctl is-enabled ${name} 2> /dev/null) && \
-      echo ${name} $(systemctl is-active ${name}) $enabled; \
-      done | column -t | grep --color=always '\(disabled\|inactive\|$\)' | nl -bn
-}
-alias current='cat /home/l_samenv/boxtools/current'
-service_status router frappy display
-echo "> current  # show currently installed state"