This review has the goal of upgrading Seahub and depends to Django22.
This will break the installation of the www/py-django-constance port because of conflicting dependencies. The port depends on www/py-django-picklefield (which is switched to Django 2.2 in this review) and Django 1.11 at the moment, therefore www/py-django-constance should then also be switched to Django 2.2.
Otherwise everything looks OK.
At last but not least: Can you please add the related tracking bug 245309 in the commit log?