Ticket #16909: 16909.2.patch

wp-admin/network/edit.php

@@ -14 +14 @@
         wp_die( __( 'Multisite support is not enabled.' ) );
 
 if ( empty( $_GET['action'] ) ) {
-        wp_redirect( admin_url( 'index.php' ) );
+        wp_redirect( self_admin_url( 'index.php' ) );
         exit;
 }
 

wp-admin/user/admin.php

@@ -12 +12 @@
 require_once( dirname(dirname(__FILE__)) . '/admin.php');
 
 if ( ! is_multisite() ) {
-        wp_redirect( admin_url() );
+        wp_redirect( self_admin_url() );
         exit;
 }