Fix broken User link_name validations. Changes in r1014 still caused some problems so I came out with new idea to compare User accounts (previously called "id"). Patch by: Pawel Solyga

     1

from django.dispatch import Signal

     2

     3

request_started = Signal()

     4

request_finished = Signal()

     5

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