[1.6.x] Fixed #22966 -- Clarified which release notes appear for each doc version.
[1.6.x] Fixed #22966 -- Clarified which release notes appear for each doc version.

Thanks haimunt at yahoo.com for the suggestion.

Backport of e6b3d6c22f from master

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