[1.8.x] Updated startproject MIDDLEWARE_CLASSES in docs.
[1.8.x] Updated startproject MIDDLEWARE_CLASSES in docs.

Backport of ad31bc0565914c4676bfb7c116c4be407a367be4 from master

h4r5h1t/django-hauthy,h4r5h1t/django-hauthy,h4r5h1t/django-hauthy,pquentin/django,h4r5h1t/django-hauthy,pquentin/django,pquentin/django