Merge branch 'refactor/keys' into 'develop'

lib/pleroma/keys.ex

lib/pleroma/signature.ex

lib/pleroma/user.ex

lib/pleroma/web/activity_pub/activity_pub_controller.ex

lib/pleroma/web/activity_pub/views/user_view.ex

lib/pleroma/web/federator/federator.ex

lib/pleroma/web/salmon/salmon.ex

lib/pleroma/web/web_finger/web_finger.ex

test/keys_test.exs

test/user_test.exs

test/web/activity_pub/activity_pub_test.exs

test/web/activity_pub/views/user_view_test.exs

test/web/salmon/salmon_test.exs

test/web/web_finger/web_finger_test.exs