[1.6.x] Added some missing items to the 1.6.3 release notes.
[1.6.x] Added some missing items to the 1.6.3 release notes.

Backport of c2b269df6e from master

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