Ensure the requires for the admin bootstrap are documented in all wp-admin/user/ files.

Props NikV for the initial patch.
Fixes #29111.

Built from https://develop.svn.wordpress.org/trunk@30228


git-svn-id: http://core.svn.wordpress.org/trunk@30228 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/user/user-edit.php

@@ -7,6 +7,7 @@
  * @since 3.1.0
  */
 
+/** Load WordPress Administration Bootstrap */
 require_once( dirname( __FILE__ ) . '/admin.php' );
 
 require( ABSPATH . 'wp-admin/user-edit.php' );