Add 'README.rename.netdevices'.

remote-copy_gateway-config.sh

@@ -251,6 +251,10 @@ Notice:
    You have to change some configuration files becaus the because
    the configuration of network interfaces must not be equal.
 
+   !! Take care, to use the right device names !!
+   Maybe they are called i.e. 'enp0sXX', but you can rename it.
+   See also : README.rename.netdevices
+
    For the backup gateway host:
       eth1 --> LAN
       eth2 --> WAN or ppp0 (DSL device)
@@ -263,8 +267,9 @@ Notice:
    So you have to change the following files
       dsl-provider.${_network}: ppp0 comes over eth2
       interfaces.${_network}: see above
+      default_isc-dhcp-server.${_network}
       ipt-firewall.${_network}: LAN device (mostly $local_if_1) = eth1
-                    second LAN WLAN or what ever (if present) = eth0
+                                second LAN WLAN or what ever (if present) = eth0
          
 EOF