Merge branch 'master' into glitch-soc/master

Conflicts:
	config/routes.rb

Added the “endorsements” route from upstream.

app/controllers/accounts_controller.rb

@@ -43,7 +43,7 @@ class AccountsController < ApplicationController
       format.json do
         skip_session!
 
-        render_cached_json(['activitypub', 'actor', @account.cache_key], content_type: 'application/activity+json') do
+        render_cached_json(['activitypub', 'actor', @account], content_type: 'application/activity+json') do
           ActiveModelSerializers::SerializableResource.new(@account, serializer: ActivityPub::ActorSerializer, adapter: ActivityPub::Adapter)
         end
       end