Add new meta tag: Revisit-After (D7)

It'd be better to provide a text field for a quantity and a selector for the unit, e.g. 2 days, 1 week, etc.

Tag.

I can't get it to work - no data is saved. :(

Also, please update the description to "The meta tag REVISIT-AFTER defines how often a search engine or spider should come to your website for re-indexing. This tag is used for websites that change their content on a regular basis.", and you forgot to add the #description field to the fieldset:

    $form['date-interval'] = array(
      '#type' => 'fieldset',
      '#title' => $this->info['label'],
      '#collapsible' => TRUE,
      '#collapsed' => TRUE,
      '#attached' => array(
        'css' => array(drupal_get_path('module', 'metatag') . '/metatag.interval.css'),
      ),
      '#description' => !empty($this->info['description']) ? $this->info['description'] : '',
    );

Related: #1282806: Upgrade path: Meta tags quick

This fixes a few problems. Firstly, it removes references to the metatag.interval.css file, which wasn't included in any of the patches above; it also adds the meta tag label to each field, so that the vertical tab helper shows a useful string; finally, the description was updated to mention there's little value in using the meta tag so also moves the tag to the end of the Advanced fieldset.

#9: metatag-n1498764-9.patch queued for re-testing.

#9: metatag-n1498764-9.patch queued for re-testing.

This patch makes the two fields show up in the main fieldset rather than using a nested fieldset, this should resolve the error showing in the testbot for the last patch.

Committed, thanks for the help nick_schuch!

Needs to be ported to D8.