[1.4.x] Minor edits to latest release notes.
[1.4.x] Minor edits to latest release notes.

Backport of 860d31ac7a3bdd4b27db8b34b110b3d801ddaf8a from master

riklaunim/django-custom-multisite,riklaunim/django-custom-multisite,riklaunim/django-custom-multisite