Merge branch 'master' into glitch-soc/merge-upstream

Conflicts:
- app/models/media_attachment.rb
  Upstream added audio attachment support
- app/serializers/initial_state_serializer.rb
  Upstream added audio attachment support and how mimetypes are returned
- app/serializers/rest/instance_serializer.rb
  Upstream added a few fields
- config/application.rb
  Upstream added a different paperclip transcoder

config/initializers/doorkeeper.rb

@@ -82,7 +82,13 @@ Doorkeeper.configure do
                   :'read:search',
                   :'read:statuses',
                   :follow,
-                  :push
+                  :push,
+                  :'admin:read',
+                  :'admin:read:accounts',
+                  :'admin:read:reports',
+                  :'admin:write',
+                  :'admin:write:accounts',
+                  :'admin:write:reports'
 
   # Change the way client credentials are retrieved from the request object.
   # By default it retrieves first from the `HTTP_AUTHORIZATION` header, then