Merge remote-tracking branch 'origin/master' into merge-upstream

Conflicts:
	app/views/layouts/mailer.html.haml
	config/locales/ko.yml

lib/mastodon/premailer_webpack_strategy.rb

@@ -2,7 +2,7 @@
 
 module PremailerWebpackStrategy
   def load(url)
-    asset_host = ENV['ASSET_HOST'] || ENV['WEB_DOMAIN'] || ENV['LOCAL_DOMAIN']
+    asset_host = ENV['CDN_HOST'] || ENV['WEB_DOMAIN'] || ENV['LOCAL_DOMAIN']
 
     if Webpacker.dev_server.running?
       asset_host = "#{Webpacker.dev_server.protocol}://#{Webpacker.dev_server.host_with_port}"

lib/mastodon/version.rb

@@ -21,7 +21,7 @@ module Mastodon
     end
 
     def flags
-      'rc2'
+      ''
     end
 
     def to_a