Manually-resolved conflicts:
.circleci/config.yml
app/controllers/accounts_controller.rb
app/controllers/auth/passwords_controller.rb
app/controllers/statuses_controller.rb
app/javascript/packs/public.js
app/models/media_attachment.rb
app/views/stream_entries/_content_spoiler.html.haml
app/views/stream_entries/_media.html.haml
config/locales/en.yml
config/locales/ja.yml
config/locales/pl.yml
lib/mastodon/version.rb
Some content from app/javascript/packs/public.js has been split to
app/javascript/core/settings.js.
Translation strings for glitch-soc's keyword mutes were dropped.
Everything else was mostly “take both”.
* Improve webfinger templates and make tests more flexible
* Clean up AS2 representation of actor
* Refactor outbox
* Create activities representation
* Add representations of followers/following collections, do not redirect /users/:username route if format is empty
* Remove unused translations
* ActivityPub endpoint for single statuses, add ActivityPub::TagManager for better
URL/URI generation
* Add ActivityPub::TagManager#to
* Represent all attachments as Document instead of Image/Video specifically
(Because for remote ones we may not know for sure)
Add mentions and hashtags representation to AP notes
* Add AP-resolvable hashtag URIs
* Use ActiveModelSerializers for ActivityPub
* Clean up unused translations
* Separate route for object and activity
* Adjust cc/to matrices
* Add to/cc to activities, ensure announce activity embeds target status and
not the wrapper status, add "id" to all collections
