Don't initially change network settings for generic image

src/freedombone-image-customise

@@ -97,6 +97,7 @@ EOF
 }
 
 configure_networking() {
+	if [[ $GENERIC_IMAGE == "no" ]]; then
         echo "# This file describes the network interfaces available on your system
 # and how to activate them. For more information, see interfaces(5).
 
@@ -141,6 +142,7 @@ iface eth0 inet static
         e=${hexarray[$RANDOM%16]}${hexarray[$RANDOM%16]}
         sed -i "s|#hwaddress ether.*|hwaddress ether de:$a:$b:$c:$d:$e|g" \ 
             $rootdir/etc/network/interfaces
+	fi
 
     sed -i "s/nameserver.*/nameserver $NAMESERVER1/g" $rootdir/etc/resolv.conf
     sed -i "/nameserver $NAMESERVER1/a\nameserver $NAMESERVER2" $rootdir/etc/resolv.conf