Index: wp-admin/user/admin.php
===================================================================
--- wp-admin/user/admin.php	(revision 25936)
+++ wp-admin/user/admin.php	(working copy)
@@ -2,13 +2,24 @@
 /**
  * WordPress User Administration Bootstrap
  *
+ * @since 3.1.0
+ *
  * @package WordPress
  * @subpackage Administration
+ */
+
+/**
+ * The current request is for a user admin screen /wp-admin/user/
+ *
  * @since 3.1.0
+ * @var bool
  */
-
 define('WP_USER_ADMIN', true);
 
+
+/*
+ * Include WordPress admin bootstrap.
+ */
 require_once( dirname(dirname(__FILE__)) . '/admin.php');
 
 if ( ! is_multisite() ) {
@@ -17,6 +28,11 @@
 }
 
 $redirect_user_admin_request = ( ( $current_blog->domain != $current_site->domain ) || ( $current_blog->path != $current_site->path ) );
+/**
+ * Filter whether user and network admin redirects should happen.
+ *
+ * @param bool $redirect_user_admin_request True if the request should be redirected
+ */
 $redirect_user_admin_request = apply_filters( 'redirect_user_admin_request', $redirect_user_admin_request );
 if ( $redirect_user_admin_request ) {
 	wp_redirect( user_admin_url() );