To ensure consistent platform behaviour (reverse proxy, memcache, and so on), add the following line to your settings.php file after the require for settings.inc:

< php require '/var/acquia/drupal/settings/overrides.php';

You might need to manually add these override files in non-production or development environment. For example, local IDEs.
Sample: /var/acquia/drupal/settings/overrides.php

<?php

if (defined('Drupal::VERSION')) {
    require_once '/var/acquia/drupal/settings/overrides-d8+.php';
} elseif (defined('VERSION')) {
    if (version_compare(VERSION, '7', '>=')) {
        require_once '/var/acquia/drupal/settings/overrides-d7.php';
    }
}

<?php

if (empty($settings['reverse_proxy_addresses']) && !empty($settings['ah_reverse_proxy_addresses'])) {
    $settings['reverse_proxy_addresses'] = $settings['ah_reverse_proxy_addresses'];
}