Merge branch 'MDL-37673-muc-groupdata-typo' of git://github.com/mudrd8mz/moodle

diff --cc lib/db/caches.php
index 6299390,8bead1d..fa71321
--- 1/lib/db/caches.php
--- 2/lib/db/caches.php
+++ b/lib/db/caches.php
@@@ -102,14 -102,7 +102,14 @@@ $definitions = array
          'mode' => cache_store::MODE_APPLICATION,
          'simplekeys' => true, // The course id the groupings exist for.
          'simpledata' => true, // Array of stdClass objects containing only strings.
-         'persist' => true, // Likely there will be a couple of calls to this.
+         'persistent' => true, // Likely there will be a couple of calls to this.
          'persistmaxsize' => 2, // The original cache used 1, we've increased that to two.
 +    ),
 +     // Used to cache calendar subscriptions.
 +    'calendar_subscriptions' => array(
 +        'mode' => cache_store::MODE_APPLICATION,
 +        'simplekeys' => true,
 +        'simpledata' => true,
 +        'persistent' => true,
      )
  );