Network admin multisite checks and docs. see #14435.

git-svn-id: https://develop.svn.wordpress.org/trunk@16272 602fd350-edb4-49c9-b593-d223f7449a82

wp-admin/network/users.php

@@ -7,8 +7,12 @@
  * @since 3.0.0
  */
 
+/** Load WordPress Administration Bootstrap */
 require_once( './admin.php' );
 
+if ( ! is_multisite() )
+	wp_die( __( 'Multisite support is not enabled.' ) );
+
 $wp_list_table = get_list_table('WP_MS_Users_List_Table');
 $wp_list_table->check_permissions();
 $wp_list_table->prepare_items();
@@ -72,6 +76,8 @@ if ( isset( $_REQUEST['updated'] ) && $_REQUEST['updated'] == 'true' && ! empty(
 	?>
 	</h2>
 
+	<?php $wp_list_table->views(); ?>
+
 	<form action="" method="get" class="search-form">
 		<p class="search-box">
 		<input type="text" name="s" value="<?php echo esc_attr( $usersearch ); ?>" class="search-input" id="user-search-input" />