fix unicodedecodeerror for cookies by using cookie_date as sessions middleware does
fix unicodedecodeerror for cookies by using cookie_date as sessions middleware does

diefenbach/django-lfs,leadbrick/django-lfs,baffolobill/django-lfs,wisonwang/django-lfs,wisonwang/django-lfs,baffolobill/django-lfs,leadbrick/django-lfs,diefenbach/django-lfs,pigletto/django-lfs,leadbrick/django-lfs,wisonwang/django-lfs,diefenbach/django-lfs,pigletto/django-lfs,baffolobill/django-lfs,pigletto/django-lfs