Multisite: Replace `is_super_admin()` with a proper capability check when showing a notice about `WPLANG`.

In multisite, the notice is displayed to users that have the `manage_network_options` capability. In non-multisite, the notice is displayed to users with the `manage_options` capability.

Props Dhaval Parekh.
Fixes #39207. See #37616.

Built from https://develop.svn.wordpress.org/trunk@39947


git-svn-id: http://core.svn.wordpress.org/trunk@39884 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/options-general.php

@@ -149,7 +149,8 @@ if ( ! empty( $languages ) || ! empty( $translations ) ) {
 
 			// Add note about deprecated WPLANG constant.
 			if ( defined( 'WPLANG' ) && ( '' !== WPLANG ) && $locale !== WPLANG ) {
-				if ( is_super_admin() ) {
+				if ( is_multisite() && current_user_can( 'manage_network_options' )
+					|| ! is_multisite() && current_user_can( 'manage_options' ) ) {
 					?>
 					<p class="description">
 						<strong><?php _e( 'Note:' ); ?></strong> <?php printf( __( 'The %s constant in your %s file is no longer needed.' ), '<code>WPLANG</code>', '<code>wp-config.php</code>' ); ?>

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.8-alpha-39946';
+$wp_version = '4.8-alpha-39947';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.