Argument parsing for synamic DNS where no provider given

src/freedombone

     read_config_param 'MY_USERNAME'
     read_config_param 'SYSTEM_TYPE'
     read_config_param 'ONION_ONLY'
+    read_config_param 'DDNS_PROVIDER'
+    read_config_param 'DDNS_USERNAME'
+    read_config_param 'DDNS_PASSWORD'
 
     if [ ! -d /home/$MY_USERNAME ]; then
         echo $"There is no user '$MY_USERNAME' on the system. Use 'adduser $MY_USERNAME' to create the user."
         exit 3
     fi
     if [[ $SYSTEM_TYPE != "mesh"* ]]; then
-        if [[ $ONION_ONLY == "no" ]]; then
-            if [ ! $DDNS_USERNAME ]; then
-                echo $'Please provide the username for your dynamic DNS provider with the --ddnsuser option'
-                exit 7823
-            fi
-            if [ ! $DDNS_PASSWORD ]; then
-                echo $'Please provide the password for your dynamic DNS provider with the --ddnspass option'
-                exit 6382
+        if [[ $DDNS_PROVIDER != 'none' ]]; then
+            if [[ $ONION_ONLY == "no" ]]; then
+                if [ ! $DDNS_USERNAME ]; then
+                    echo $'Please provide the username for your dynamic DNS provider with the --ddnsuser option'
+                    exit 7823
+                fi
+                if [ ! $DDNS_PASSWORD ]; then
+                    echo $'Please provide the password for your dynamic DNS provider with the --ddnspass option'
+                    exit 6382
+                fi
             fi
         fi
     fi