Change dns used for external IP address detection

src/freedombone-utils-network

 # If the system is on an IPv6 network
 IPV6_NETWORK='2001:470:26:307'
 
+# Destinations used to get the external IP address of this system
+# Google ipv6 DNS is 2001:4860:4860::8888
+IPV4_ADDRESS_TEST_DESTINATION='85.214.73.63'
+IPV6_ADDRESS_TEST_DESTINATION='2620:0:ccc::2'
+
+
 # The static IP address of the system within the local network
 # By default the IP address is dynamic within your LAN
 LOCAL_NETWORK_STATIC_IP_ADDRESS=
 }
 
 function get_ipv4_address {
-    IPv4dev=$(ip route get 8.8.8.8 | awk '{for(i=1;i<=NF;i++)if($i~/dev/)print $(i+1)}')
+    IPv4dev=$(ip route get $IPV4_ADDRESS_TEST_DESTINATION | awk '{for(i=1;i<=NF;i++)if($i~/dev/)print $(i+1)}')
     echo $(ip -o -f inet addr show dev "$IPv4dev" | awk '{print $4}' | awk 'END {print}' | awk -F '/' '{print $1}')
 }
 
 function get_ipv6_address {
-    echo $(ip -6 route get 2001:4860:4860::8888 | awk -F " " '{ for(i=1;i<=NF;i++) if ($i == "src") print $(i+1) }')
+    echo $(ip -6 route get $IPV6_ADDRESS_TEST_DESTINATION | awk -F " " '{ for(i=1;i<=NF;i++) if ($i == "src") print $(i+1) }')
 }
 
 # NOTE: deliberately no exit 0