Load: Re-add `session.php`.

`session.php` is occasionally included directly by custom external code, so should continue to be available. This behaviour is deprecated.

Partial revert of [38373].
See #36335, #39027.


Built from https://develop.svn.wordpress.org/trunk@39453


git-svn-id: http://core.svn.wordpress.org/trunk@39393 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/includes/update-core.php

@@ -709,7 +709,7 @@ $_old_files = array(
 // Don't delete, yet: 'wp-admin/includes/class-wp-upgrader-skins.php',
 // Don't delete, yet: 'wp-includes/class-feed.php',
 'wp-includes/locale.php',
-'wp-includes/session.php',
+// Don't delete, yet: 'wp-includes/session.php',
 'wp-includes/customize/class-wp-customize-themes-panel.php', // Removed in beta; when the feature comes back remember to remove it from this array. See #37661.
 );
 

wp-includes/session.php

@@ -0,0 +1,11 @@
+<?php
+/**
+ * Session API
+ *
+ * @since 4.0.0
+ */
+
+_deprecated_file( basename( __FILE__ ), '4.7.0' );
+
+require_once( ABSPATH . WPINC . '/class-wp-session-tokens.php' );
+require_once( ABSPATH . WPINC . '/class-wp-user-meta-session-tokens.php' );

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.8-alpha-39451';
+$wp_version = '4.8-alpha-39453';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.