Merge remote-tracking branch 'origin/master' into gs-master

Conflicts:
 	app/controllers/home_controller.rb
 	app/controllers/stream_entries_controller.rb
 	app/javascript/mastodon/locales/ja.json
 	app/javascript/mastodon/locales/pl.json

app/controllers/home_controller.rb

@@ -2,7 +2,9 @@
 
 class HomeController < ApplicationController
   before_action :authenticate_user!
+
   before_action :set_pack
+  before_action :set_referrer_policy_header
   before_action :set_initial_state_json
 
   def index
@@ -67,4 +69,8 @@ class HomeController < ApplicationController
       about_path
     end
   end
+
+  def set_referrer_policy_header
+    response.headers['Referrer-Policy'] = 'origin'
+  end
 end