Change ActivityPub paging to match spec. Clean up ActivityPub outbox changes. (#2410)

* Change ActivityPub paging to match spec. Clean up ActivityPub outbox changes.

* Fix code style and test failures for OutboxController.

* Attempt to fix CI errors.

config/application.rb

@@ -64,7 +64,7 @@ module Mastodon
     config.middleware.insert_before 0, Rack::Cors do
       allow do
         origins  '*'
-
+        resource '/@:username',  headers: :any, methods: [:get], credentials: false
         resource '/api/*',       headers: :any, methods: [:post, :put, :delete, :get, :patch, :options], credentials: false, expose: ['Link', 'X-RateLimit-Reset', 'X-RateLimit-Limit', 'X-RateLimit-Remaining', 'X-Request-Id']
         resource '/oauth/token', headers: :any, methods: [:post], credentials: false
       end

config/locales/en.yml

@@ -43,12 +43,12 @@ en:
   activitypub:
     activity:
       announce:
-        name: "%{account_name} announced an activity."
+        name: "%{account_name} shared an activity."
       create:
         name: "%{account_name} created a note."
     outbox:
       name: "%{account_name}'s Outbox"
-      summary: A collection of activities from user %{account_name}.
+      summary: "A collection of activities from user %{account_name}."
   admin:
     accounts:
       are_you_sure: Are you sure?