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

Conflicts:
	app/controllers/accounts_controller.rb
	app/javascript/mastodon/locales/pl.json
	app/views/about/more.html.haml

Conflicts in `accounts_controller.rb` resolved by taking upstream's
version + our `use_pack`.

Conflicts in `pl.json` resolved by taking upstream's changes.

Conflicts in `aboute/more.html.haml` resolved by taking upstream's changes.

app/serializers/rest/relationship_serializer.rb

@@ -2,7 +2,8 @@
 
 class REST::RelationshipSerializer < ActiveModel::Serializer
   attributes :id, :following, :showing_reblogs, :followed_by, :blocking,
-             :muting, :muting_notifications, :requested, :domain_blocking
+             :muting, :muting_notifications, :requested, :domain_blocking,
+             :endorsed
 
   def id
     object.id.to_s
@@ -41,4 +42,8 @@ class REST::RelationshipSerializer < ActiveModel::Serializer
   def domain_blocking
     instance_options[:relationships].domain_blocking[object.id] || false
   end
+
+  def endorsed
+    instance_options[:relationships].endorsed[object.id] || false
+  end
 end