Merge branch 'develop' into conversations-import

CHANGELOG.md

docs/api/admin_api.md

docs/installation/debian_based_en.md

docs/installation/debian_based_jp.md

lib/mix/tasks/pleroma/user.ex

lib/pleroma/bbs/handler.ex

lib/pleroma/filter.ex

lib/pleroma/user.ex

lib/pleroma/user/info.ex

lib/pleroma/web/activity_pub/activity_pub.ex

lib/pleroma/web/activity_pub/visibility.ex

lib/pleroma/web/federator/publisher.ex

lib/pleroma/web/mastodon_api/mastodon_api_controller.ex

lib/pleroma/web/twitter_api/twitter_api_controller.ex

...rations/20190515222404_add_thread_visibility_function.exs

test/tasks/user_test.exs

test/user_test.exs

test/web/activity_pub/activity_pub_test.exs