Merge branch 'refactor/use-constants' into 'develop'

lib/mix/tasks/pleroma/database.ex

lib/pleroma/activity/search.ex

lib/pleroma/constants.ex

lib/pleroma/web/activity_pub/activity_pub.ex

lib/pleroma/web/activity_pub/mrf/hellthread_policy.ex

lib/pleroma/web/activity_pub/mrf/keyword_policy.ex

lib/pleroma/web/activity_pub/mrf/reject_non_public.ex

lib/pleroma/web/activity_pub/mrf/simple_policy.ex

lib/pleroma/web/activity_pub/mrf/tag_policy.ex

lib/pleroma/web/activity_pub/publisher.ex

lib/pleroma/web/activity_pub/transmogrifier.ex

lib/pleroma/web/activity_pub/utils.ex

lib/pleroma/web/activity_pub/visibility.ex

lib/pleroma/web/auth/authenticator.ex

lib/pleroma/web/common_api/common_api.ex

lib/pleroma/web/common_api/utils.ex

lib/pleroma/web/mastodon_api/mastodon_api_controller.ex

lib/pleroma/web/oauth/oauth_controller.ex

lib/pleroma/web/oauth/token.ex

lib/pleroma/web/ostatus/activity_representer.ex