Merge pull request #29217 from nextcloud/backport/29136/stable22

[stable22] Add documentation for files_no_background_scan

Author: kesselb

config/config.sample.php

@@ -1948,4 +1948,15 @@
  */
 
 'login_form_autocomplete' => true,
+
+/**
+ * Disable background scanning of files
+ *
+ * By default, a background job runs every 10 minutes and execute a background
+ * scan to sync filesystem and database. Only users with unscanned files
+ * (size=0 in filecache) are included. Maximum 500 users per job.
+ *
+ * Defaults to ``true``
+ */
+'files_no_background_scan' => false,
 ];