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

Conflicts:
- `Gemfile.lock`:
  Not a real conflict, just a glitch-soc-only dependency too close to a
  dependency that got updated upstream. Updated as well.
- `app/models/status.rb`:
  Not a real conflict, just a change too close to glitch-soc-changed code
  for optionally showing boosts in public timelines.
  Applied upstream changes.
- `app/views/layouts/application.html.haml`:
  Upstream a new, static CSS file, conflict due to glitch-soc's theming
  system, include the file regardless of the theme.
- `config/initializers/content_security_policy.rb`:
  Upstream dropped 'unsafe-inline' from the 'style-src' directive, but
  both files are very different. Removed 'unsafe-inline' as well.

app/lib/request.rb

@@ -73,8 +73,6 @@ class Request
       response.body_with_limit if http_client.persistent?
 
       yield response if block_given?
-    rescue => e
-      raise e.class, e.message, e.backtrace[0]
     ensure
       http_client.close unless http_client.persistent?
     end

app/lib/rss/serializer.rb

@@ -0,0 +1,38 @@
+# frozen_string_literal: true
+
+class RSS::Serializer
+  private
+
+  def render_statuses(builder, statuses)
+    statuses.each do |status|
+      builder.item do |item|
+        item.title(status_title(status))
+            .link(ActivityPub::TagManager.instance.url_for(status))
+            .pub_date(status.created_at)
+            .description(status.spoiler_text.presence || Formatter.instance.format(status, inline_poll_options: true).to_str)
+
+        status.media_attachments.each do |media|
+          item.enclosure(full_asset_url(media.file.url(:original, false)), media.file.content_type, media.file.size)
+        end
+      end
+    end
+  end
+
+  def status_title(status)
+    return "#{status.account.acct} deleted status" if status.destroyed?
+
+    preview = status.proper.spoiler_text.presence || status.proper.text
+    if preview.length > 30 || preview[0, 30].include?("\n")
+      preview = preview[0, 30]
+      preview = preview[0, preview.index("\n").presence || 30] + '…'
+    end
+
+    preview = "#{status.proper.spoiler_text.present? ? 'CW ' : ''}“#{preview}”#{status.proper.sensitive? ? ' (sensitive)' : ''}"
+
+    if status.reblog?
+      "#{status.account.acct} boosted #{status.reblog.account.acct}: #{preview}"
+    else
+      "#{status.account.acct}: #{preview}"
+    end
+  end
+end

app/lib/sidekiq_error_handler.rb

@@ -1,13 +1,24 @@
 # frozen_string_literal: true
 
 class SidekiqErrorHandler
+  BACKTRACE_LIMIT = 3
+
   def call(*)
     yield
   rescue Mastodon::HostValidationError
     # Do not retry
+  rescue => e
+    limit_backtrace_and_raise(e)
   ensure
     socket = Thread.current[:statsd_socket]
     socket&.close
     Thread.current[:statsd_socket] = nil
   end
+
+  private
+
+  def limit_backtrace_and_raise(e)
+    e.set_backtrace(e.backtrace.first(BACKTRACE_LIMIT))
+    raise e
+  end
 end