Docs: Add a missing summary, description, and @since version to the DocBlock for wp_redirect_admin_locations().

Introduced in [19880].

See #32246.


git-svn-id: https://develop.svn.wordpress.org/trunk@36010 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/canonical.php

@@ -602,6 +602,12 @@ function redirect_guess_404_permalink() {
 }
 
 /**
+ * Redirects a variety of shorthand URLs to the admin.
+ *
+ * If a user visits example.com/admin, they'll be redirected to /wp-admin.
+ * Visiting /login redirects to /wp-login.php, and so on.
+ *
+ * @since 3.4.0
  *
  * @global WP_Rewrite $wp_rewrite
  */