* Because Django 1.11 is End-of-Life since April 2020 thus switch over to
Django 2.2 which is the current LTS release.
* Set the minimum required Python version for Django 2.2 accordingly and
bump PORTREVISION for changed dependencies.
* Mark the repo-copied port www/py-dj22-django-tables2 as DEPRECATED because
it's obsolete now. Don't set an expiration date yet as it's still used by
net-mgmt/netbox and a few more Django 1.11 ports need to be assigned to
Django 2.2 first.
* Also update the CONFLICTS_INSTALL entries as the repo-copied port
py-dj21-django-tables no longer exists in the Ports tree.
PR: 245309
4b8365703b