Fixed #21483 -- Added WSGI environ to kwargs sent to request_started signal.

                    raise

        set_script_prefix(get_script_name(environ))

        signals.request_started.send(sender=self.__class__)

        signals.request_started.send(sender=self.__class__, environ=environ)

        try:

            request = self.request_class(environ)

        except UnicodeDecodeError:

from django.dispatch import Signal

request_started = Signal()

request_started = Signal(providing_args=["environ"])

request_finished = Signal()

got_request_exception = Signal(providing_args=["request"])

            self.load_middleware()

        request_started.disconnect(close_old_connections)

        request_started.send(sender=self.__class__)

        request_started.send(sender=self.__class__, environ=environ)

        request_started.connect(close_old_connections)

        request = WSGIRequest(environ)

        # sneaky little hack so that we can easily get round

``sender``

    The handler class -- e.g. ``django.core.handlers.wsgi.WsgiHandler`` -- that

    handled the request.

``environ``

    The ``environ`` dictionary provided to the request.

.. versionchanged:: 1.8

    The ``environ`` argument was added.

request_finished

----------------

  :meth:`Signal.send_robust() <django.dispatch.Signal.send_robust>` now have

  their traceback attached as a ``__traceback__`` attribute.

* The ``environ`` argument, which contains the WSGI environment structure from

  the request, was added to the :data:`~django.core.signals.request_started`

  signal.

Templates

^^^^^^^^^