Update fenrus.sh

Add "There is currently no update path available." until fully tested

ct/fenrus.sh

@@ -56,6 +56,8 @@ function default_settings() {
 function update_script() {
 header_info
 if [[ ! -d /opt/${APP} ]]; then msg_error "No ${APP} Installation Found!"; exit; fi
+msg_error "There is currently no update path available."
+exit
 msg_info "Updating ${APP}"
 systemctl stop ${APP}
 git clone https://github.com/revenz/Fenrus.git