Issue #3003716 by dpi, jibran, marcoscano: Coerce bubbled max-age to a floor or ceiling

<?php

/**

 * @file

 * Module install file.

 */

use Drupal\Core\Cache\Cache;

/**

 * Add 'cache_control_override.settings'.

 */

function cache_control_override_update_8101() {

  \Drupal::configFactory()

    ->getEditable('cache_control_override.settings')

    // These values effectively disable max age coercion.

    ->set('max_age.minimum', 0)

    ->set('max_age.maximum', Cache::PERMANENT)

    ->save(TRUE);

}

<?php

/**

 * @file

 * Post updates for Cache Control Override.

 */

use Drupal\Core\Cache\Cache;

/**

 * Clear the entity type cache.

 *

 * New arguments added to service

 * 'cache_control_override.cache_control_override_subscriber'.

 */

function cache_control_override_post_update_service_arguments() {

  // Empty post_update hook.

}

services:

  cache_control_override.cache_control_override_subscriber:

    class: Drupal\cache_control_override\EventSubscriber\CacheControlOverrideSubscriber

    arguments: ['@config.factory']

    tags:

      - { name: event_subscriber }

  cache_control_override.page_cache_response_policy.deny_on_cache_override:

max_age:

  minimum: 0

  maximum: -1

cache_control_override.settings:

  type: config_object

  label: 'Cache control override settings'

  mapping:

    max_age:

      type: mapping

      mapping:

        minimum:

          type: integer

          label: 'Minimum max age, if max age is greater than 0. Leave empty to disable.'

        maximum:

          type: integer

          label: 'Maximum max age, if max age is greater than 0. Set to -1 to disable.'