  * Added the :setting:`SECURE_HSTS_PRELOAD` setting to allow appending the
    ``preload`` directive to the ``Strict-Transport-Security`` header.
  
  Serialization
  ~~~~~~~~~~~~~
  
  * The new ``django.core.serializers.base.Serializer.stream_class`` attribute
    allows subclasses to customize the default stream.
 
</s> remove or you can rely on the :class:`~django.middleware.common.CommonMiddleware`
 </s> add or you can rely on the :class:`~django.middleware.http.ConditionalGetMiddleware`
* :class:`~django.middleware.http.ConditionalGetMiddleware` now adds the
  ``ETag`` header to responses.

  * Added the :setting:`SECURE_HSTS_PRELOAD` setting to allow appending the
    ``preload`` directive to the ``Strict-Transport-Security`` header.
  
* :class:`~django.middleware.http.ConditionalGetMiddleware` now adds the
  ``ETag`` header to responses.

  Serialization
  ~~~~~~~~~~~~~
  
  * The new ``django.core.serializers.base.Serializer.stream_class`` attribute
    allows subclasses to customize the default stream.
keep keep add keep keep keep keep keep
 Fixed #26447 -- Deprecated settings.USE_ETAGS in favor of ConditionalGetMiddleware. 
docs/releases/1.11.txt