* Add tests for some cachable responses
This only covers responses that we should have managed to make cachable
so far. It's not the case of all responses that should be cachable in
the end.
* Fix RSS feeds not being cachable
* Process Create / Announce activity in FetchRemoteStatusService
* Use activity URL in ActivityPub for reblogs
* Redirect to the original status on StatusesController#show
* Add coverage for admin/confirmations controller
* Coverage for statuses controller show action
* Add coverage for admin/domain_blocks controller
* Add coverage for settings/profiles#update