Read dynamic dns provider

src/freedombone-utils-webadmin

@@ -119,6 +119,7 @@ function web_admin_create_users {
 }
 
 function web_admin_create_add_apps {
+    read_config_param DDNS_PROVIDER
     local_hostname=$(grep 'host-name' /etc/avahi/avahi-daemon.conf | awk -F '=' '{print $2}').local
     apps_add_template_filename="/var/www/${local_hostname}/htdocs/admin/apps_add_template.html"
     appslist_add_filename="/var/www/${local_hostname}/htdocs/admin/apps_add.html"