Merge commit 'b85c387c5c0527b0ad31c27031a09d361826c5fc' into glitch-soc/merge-upstream

Conflicts:
- `config/initializers/content_security_policy.rb`:
  Kept our version, it was not affected by upstream's bug.

app/services/backup_service.rb

@@ -77,8 +77,8 @@ class BackupService < BaseService
         path = m.file&.path
         next unless path
 
-        path = path.gsub(/\A.*\/system\//, '')
-        path = path.gsub(/\A\/+/, '')
+        path = path.gsub(%r{\A.*/system/}, '')
+        path = path.gsub(%r{\A/+}, '')
         download_to_zip(zipfile, m.file, path)
       end