updated core to 7.56, secutity update

modules/system/system.info

@@ -12,8 +12,8 @@ files[] = system.test
 required = TRUE
 configure = admin/config/system
 
-; Information added by Drupal.org packaging script on 2017-02-01
-version = "7.54"
+; Information added by Drupal.org packaging script on 2017-06-21
+version = "7.56"
 project = "drupal"
-datestamp = "1485986921"
+datestamp = "1498069849"
 

modules/system/system.install

@@ -160,7 +160,7 @@ function system_requirements($phase) {
       if (empty($drivers)) {
         $database_ok = FALSE;
         $pdo_message = $t('Your web server does not appear to support any common PDO database extensions. Check with your hosting provider to see if they support PDO (PHP Data Objects) and offer any databases that <a href="@drupal-databases">Drupal supports</a>.', array(
-          '@drupal-databases' => 'http://drupal.org/node/270#database',
+          '@drupal-databases' => 'https://www.drupal.org/requirements/database',
         ));
       }
       // Make sure the native PDO extension is available, not the older PEAR

modules/system/tests/cron_queue_test.info

@@ -5,8 +5,8 @@ version = VERSION
 core = 7.x
 hidden = TRUE
 
-; Information added by Drupal.org packaging script on 2017-02-01
-version = "7.54"
+; Information added by Drupal.org packaging script on 2017-06-21
+version = "7.56"
 project = "drupal"
-datestamp = "1485986921"
+datestamp = "1498069849"
 

modules/system/tests/system_cron_test.info

@@ -5,8 +5,8 @@ version = VERSION
 core = 7.x
 hidden = TRUE
 
-; Information added by Drupal.org packaging script on 2017-02-01
-version = "7.54"
+; Information added by Drupal.org packaging script on 2017-06-21
+version = "7.56"
 project = "drupal"
-datestamp = "1485986921"
+datestamp = "1498069849"