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/systemd/system/sethostname.service

@@ -1,12 +0,0 @@
-[Unit]
-Description = Create host name from ethernet address
-Wants=network-pre.target
-Before=network.pre-target
-
-[Service]
-Type=oneshot
-ExecStart = /usr/bin/bash /home/l_samenv/boxtools/sethostname.sh
-RemainAfterExit=yes
-
-[Install]
-WantedBy = network.target