Users: Correct a permission check when showing the User item in the `+ New` admin toolbar menu.

Props dlh
Fixes #39252

Built from https://develop.svn.wordpress.org/trunk@40581


git-svn-id: http://core.svn.wordpress.org/trunk@40451 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/admin-bar.php

@@ -718,8 +718,9 @@ function wp_admin_bar_new_content_menu( $wp_admin_bar ) {
 	if ( isset( $actions['post-new.php?post_type=content'] ) )
 		$actions['post-new.php?post_type=content'][1] = 'add-new-content';
 
-	if ( current_user_can( 'create_users' ) || current_user_can( 'promote_users' ) )
+	if ( current_user_can( 'create_users' ) || ( is_multisite() && current_user_can( 'promote_users' ) ) ) {
 		$actions[ 'user-new.php' ] = array( _x( 'User', 'add new from admin bar' ), 'new-user' );
+	}
 
 	if ( ! $actions )
 		return;

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.8-alpha-40580';
+$wp_version = '4.8-alpha-40581';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.