[HttpFoundation] Use @see annotation for better documentation generation.

src/Symfony/Component/HttpFoundation/Request.php

@@ -702,10 +702,12 @@ class Request
     }
 
     /**
-     * Returns the client IP address. See getClientIps() for more information.
+     * Returns the client IP address.
      *
      * @return string The client IP address
      *
+     * @see getClientIps()
+     *
      * @api
      */
     public function getClientIp()