[1.6.x] Fixed #22167 -- Improved documentation on context processors
[1.6.x] Fixed #22167 -- Improved documentation on context processors

Backport of e7ffba8f78849fbf60b98fb8d67ef4577b585e3b from master.

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