fixes #2478: Add links for easy opt-out of emails

config/danbooru_default_config.rb

@@ -360,6 +360,10 @@ module Danbooru
       false
     end
 
+    def email_key
+      "zDMSATq0W3hmA5p3rKTgD"
+    end
+
     # For downloads, if the host matches any of these IPs, block it
     def banned_ip_for_download?(ip_addr)
       raise ArgumentError unless ip_addr.is_a?(IPAddr)

config/routes.rb

@@ -53,6 +53,7 @@ Rails.application.routes.draw do
   end
   namespace :maintenance do
     namespace :user do
+      resource :email_notification, :only => [:show, :destroy]
       resource :password_reset, :only => [:new, :create, :edit, :update]
       resource :login_reminder, :only => [:new, :create]
       resource :deletion, :only => [:show, :destroy]