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

Conflicts:
- `README.md`:
  Upstream README has been changed, but we have a completely different one.
  Kept our `README.md`.
- `lib/sanitize_ext/sanitize_config.rb`:
  Upstream added support for more incoming HTML tags (a large subset of what
  glitch-soc accepts).
  Change the code style to match upstream's but otherwise do not change our
  code.
- `spec/lib/sanitize_config_spec.rb`:
  Upstream added support for more incoming HTML tags (a large subset of what
  glitch-soc accepts).
  Kept our version, since the tests are mostly glitch-soc's, except for cases
  which are purposefuly different.

config/initializers/paperclip.rb

@@ -90,6 +90,12 @@ if ENV['S3_ENABLED'] == 'true'
     )
   end
 
+  if ENV.has_key?('S3_STORAGE_CLASS')
+    Paperclip::Attachment.default_options[:s3_headers].merge!(
+      'X-Amz-Storage-Class' => ENV['S3_STORAGE_CLASS']
+    )
+  end
+
   # Some S3-compatible providers might not actually be compatible with some APIs
   # used by kt-paperclip, see https://github.com/mastodon/mastodon/issues/16822
   if ENV['S3_FORCE_SINGLE_REQUEST'] == 'true'

config/initializers/redis.rb

@@ -0,0 +1 @@
+Redis.sadd_returns_boolean = false