[1.6.x] Fixed #20862 -- Updated startproject MIDDLEWARE_CLASSES in docs.
[1.6.x] Fixed #20862 -- Updated startproject MIDDLEWARE_CLASSES in docs.

Thanks Keryn Knight.

Backport of 26c4bd38ac from master

redhat-openstack/django,django-nonrel/django,felixjimenez/django,redhat-openstack/django,dex4er/django,django-nonrel/django,redhat-openstack/django,django-nonrel/django,dex4er/django,redhat-openstack/django,felixjimenez/django,django-nonrel/django,felixjimenez/django,felixjimenez/django,dex4er/django