Upgrade inadyn

src/freedombone-upgrade

         fi
 
         #rebuild_exim_with_socks
-        update_inadyn_config
+        install_dynamicdns
         torrc_migrate
         nodejs_upgrade
         apt-get -yq -t stretch-backports install certbot

src/freedombone-utils-web

         return
     fi
 
+    if [ ! -f /usr/sbin/inadyn ]; then
+        return
+    fi
+
     if grep -q "{" "${INADYN_CONFIG_FILE}"; then
         return
     fi