fix sethostname.sh: check for end0 before eth0

+ correct boot order

sethostname.sh

@@ -1,7 +1,9 @@
 if [[ -f /sys/class/net/eth0/address ]]; then
-  ETHNAME=$(cat /sys/class/net/eth0/address)
-else
   ETHNAME=$(cat /sys/class/net/end0/address)
+  BASED=end0
+else
+  ETHNAME=$(cat /sys/class/net/eth0/address)
+  BASED=eth0
 fi
 FOUND=($(grep -l -r MAC=$ETHNAME /home/l_samenv/boxtools/cfg))
 if [ -z "$FOUND" ]; then
@@ -11,7 +13,7 @@ if [ -z "$FOUND" ]; then
 else
    FOUND=$(basename ${FOUND[0]})  # remove directory part
    HOSTNAME=${FOUND%%.cfg}  # remove extension
-   echo "hostname $HOSTNAME"
 fi
+echo "set hostname to $HOSTNAME based on $BASED $ETHNAME"
 echo $HOSTNAME > /etc/hostname
 echo "127.0.0.1  localhost  $HOSTNAME" > /etc/hosts

to_system/etc/systemd/system/sethostname.service

@@ -1,7 +1,6 @@
 [Unit]
 Description = Create host name from ethernet address
-Wants=network-pre.target
-Before=network.pre-target
+Before=ifup@end0.service
 
 [Service]
 Type=oneshot