Don't rely on include_path to include files.

Always use dirname() or, once available, ABSPATH.

props ketwaroo, hakre.
fixes #17092.


git-svn-id: https://develop.svn.wordpress.org/trunk@25616 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-admin/network/user-new.php

@@ -8,7 +8,7 @@
  */
 
 /** Load WordPress Administration Bootstrap */
-require_once( './admin.php' );
+require_once( dirname( __FILE__ ) . '/admin.php' );
 
 if ( ! is_multisite() )
 	wp_die( __( 'Multisite support is not enabled.' ) );
@@ -66,7 +66,7 @@ if ( isset($_GET['update']) ) {
 $title = __('Add New User');
 $parent_file = 'users.php';
 
-require('../admin-header.php'); ?>
+require( ABSPATH . 'wp-admin/admin-header.php' ); ?>
 
 <div class="wrap">
 <?php screen_icon(); ?>
@@ -104,4 +104,4 @@ if ( isset( $add_user_errors ) && is_wp_error( $add_user_errors ) ) { ?>
 	</form>
 </div>
 <?php
-require('../admin-footer.php');
+require( ABSPATH . 'wp-admin/admin-footer.php' );