Per-status control for unlisted mode, also federation for unlisted mode

Fix #233, fix #268

app/models/concerns/obfuscate_filename.rb

@@ -1,16 +0,0 @@
-module ObfuscateFilename
-  extend ActiveSupport::Concern
-
-  class_methods do
-    def obfuscate_filename(*args)
-      before_action { obfuscate_filename(*args) }
-    end
-  end
-
-  def obfuscate_filename(path)
-    file = params.dig(*path)
-    return if file.nil?
-
-    file.original_filename = "media" + File.extname(file.original_filename)
-  end
-end