*: Drop maintainership

net-mgmt/seafile-server,www/seahub: Deprecate

Updating www/seahub, and especially net-mgmt/seafile-server, is more
difficult than originally anticipated. The current version of www/seahub
also only runs with Django 4.2, which has been end-of-life since April.

Before www/seahub and net-mgmt/seafile-server are marked as BROKEN after
the migration of the affected ports to Django 5.2 [1], and then vanish
from the ports tree at the end of 2026Q2 - which would also break POLA
due the short time period - do the following to buy some time for a
possible update:

* Create required py-dj42-* ports and switch www/seahub to them. These
  py-dj42-* ports were copied from their original counterparts, are
  bound to Django 4.2, and have also been adapted for the PEP517 build

www/py-dj42-djangorestframework: Remove expired port

2024-06-15 www/py-dj42-djangorestframework: Obsolete, please use
www/py-djangorestframework instead

*/py-dj42*: Deprecate/Set to expire

* The */py-dj42* ports have no more consumers and are redundant now
  as all the other Django ports have been switched from Django 3.2
  to Django 4.2 in the last few weeks. [1]

PR:		276319 [1]
With hat:	python

net-mgmt/netbox: Create Django 4.2 consumers

* Django 3.2 is currently the "default" version in the ports tree due
  its long term support until April 2024.  Thus ports that are assigned
  to that version will exist until then.

The following ports are required to make the upgrade of
net-mgmt/netbox to the 3.6 release possible because it requires
Django 4.2.

All of the ports listed below were created on the basis of their
respective original ports:

- devel/py-dj42-django-rq
- devel/py-dj42-graphene-django