Merge branch 'cleanup-017' into 'develop'

api/config/settings/common.py

api/funkwhale_api/federation/actors.py

api/funkwhale_api/federation/library.py

api/funkwhale_api/federation/urls.py

api/funkwhale_api/federation/views.py

api/funkwhale_api/music/management/commands/import_files.py

api/funkwhale_api/music/tasks.py

api/funkwhale_api/providers/audiofile/__init__.py

api/funkwhale_api/providers/audiofile/management/__init__.py

...e_api/providers/audiofile/management/commands/__init__.py

api/funkwhale_api/providers/audiofile/tasks.py

api/tests/federation/test_actors.py

api/tests/federation/test_views.py

api/tests/music/test_models.py

api/tests/requests/test_models.py

api/tests/test_import_audio_file.py

per-user-libraries