commit 88a3f60015db7a06490da96593d4dc4a8259cc5e
Author: Moshe Weitzman <weitzman@tejasa.com>
Date:   Wed Nov 18 15:35:03 2015 -0500

    Fix #2607352 The installer needlessly requires  to be writable/

diff --git a/core/modules/system/system.install b/core/modules/system/system.install
index c9e8175..bf8d736 100644
--- a/core/modules/system/system.install
+++ b/core/modules/system/system.install
@@ -424,6 +424,11 @@ function system_requirements($phase) {
       'title' => t('Temporary files directory'),
       'directory' => drupal_realpath('temporary://'),
     );
+    $sync_dir = config_get_config_directory(CONFIG_SYNC_DIRECTORY);
+    $htaccess_files[$sync_dir . '/.htaccess'] = array(
+      'title' => t('Config directory'),
+      'directory' => $sync_dir,
+    );
     foreach ($htaccess_files as $htaccess_file => $info) {
       // Check for the string which was added to the recommended .htaccess file
       // in the latest security update.
@@ -531,23 +536,6 @@ function system_requirements($phase) {
     }
   }
 
-  // Check the config directory if it is defined in settings.php. If it isn't
-  // defined, the installer will create a valid config directory later, but
-  // during runtime we must always display an error.
-  if (!empty($GLOBALS['config_directories'])) {
-    foreach ($GLOBALS['config_directories'] as $type => $directory) {
-      $directories[] = config_get_config_directory($type);
-    }
-  }
-  elseif ($phase != 'install') {
-    $requirements['config directories'] = array(
-      'title' => t('Configuration directories'),
-      'value' => t('Not present'),
-      'description' => t('Your %file file must define the $config_directories variable as an array containing the name of a directories in which configuration files can be written.', array('%file' => $site_path . '/settings.php')),
-      'severity' => REQUIREMENT_ERROR,
-    );
-  }
-
   $requirements['file system'] = array(
     'title' => t('File system'),
   );