Disable new registrations from clients

src/freedombone-app-matrix

     sed -i "s|server_name:.*|server_name: \"${DEFAULT_DOMAIN_NAME}\"|g" "${filepath}"
     sed -i "/trusted_third_party_id_servers:/a     - ${DEFAULT_DOMAIN_NAME}" "${filepath}"
     sed -i "s|- ${DEFAULT_DOMAIN_NAME}|    - ${DEFAULT_DOMAIN_NAME}|g" "${filepath}"
+    sed -i "s|enable_registration:.*|enable_registration: False|g" "${filepath}"
 }
 
 function matrix_configure_identityserver {