Docs: Add a missing file header for wp-includes/class-wp-comment-query.php, introduced in [33750].

Also clarifies the class DocBlock summary and tags for `WP_Comment_Query`.

See #33413. See #33701.


git-svn-id: https://develop.svn.wordpress.org/trunk@33898 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/class-wp-comment-query.php

@@ -1,14 +1,21 @@
 <?php
 /**
- * WordPress Comment Query class.
+ * Comments API: WP_Comment_Query class
  *
- * See WP_Comment_Query::__construct() for accepted arguments.
- *
- * @since 3.1.0
  * @package WordPress
  * @subpackage Comment
+ * @since 4.4.0
+ */
+
+/**
+ * Core class used for querying comments.
+ *
+ * @since 3.1.0
+ *
+ * @see WP_Comment_Query::__construct() for accepted arguments.
  */
 class WP_Comment_Query {
+
 	/**
 	 * SQL for database query.
 	 *