Read ddns variables after they are defined

src/freedombone-config

     choose_rng
     choose_debian_repo
     "${PROJECT_NAME}-wifi" --networksinteractive "$WIFI_NETWORKS_FILE"
+
     "${PROJECT_NAME}-ddns"
+    read_config_param DDNS_PROVIDER
+    read_config_param DDNS_USERNAME
+    read_config_param DDNS_PASSWORD
+
     choose_default_domain_name
     choose_email_address
     interactive_key_recovery