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

Conflicts:
- `Gemfile.lock`:
  No real conflict, glitch-soc-only dependency (redcarpet) too close to an
  upstream one (rdf-normalize)
- `README.md`:
  we have different READMEs, discarded upstream's changes
- `app/views/admin/custom_emojis/index.html.haml`:
  No real conflict, different context because of glitch-soc theming
- `lib/mastodon/statuses_cli.rb`:
  Upstream added code to keep bookmarked statuses, we were already doing so
  with slightly different code. Discarded upstream's changes.
- `package.json`:
  No real conflict, glitch-soc-only dependency (favico.js) too close to
  an upstream one

app/workers/activitypub/delivery_worker.rb

@@ -50,9 +50,13 @@ class ActivityPub::DeliveryWorker
       end
     end
 
-    light.with_threshold(STOPLIGHT_FAILURE_THRESHOLD)
-         .with_cool_off_time(STOPLIGHT_COOLDOWN)
-         .run
+    begin
+      light.with_threshold(STOPLIGHT_FAILURE_THRESHOLD)
+           .with_cool_off_time(STOPLIGHT_COOLDOWN)
+           .run
+    rescue Stoplight::Error::RedLight => e
+      raise e.class, e.message, e.backtrace.first(3)
+    end
   end
 
   def failure_tracker