SECURITY: Support for confirm old as well as new email accounts

db/migrate/20160307190919_create_email_change_requests.rb

@@ -0,0 +1,15 @@
+class CreateEmailChangeRequests < ActiveRecord::Migration
+  def change
+    create_table :email_change_requests do |t|
+      t.integer :user_id, null: false
+      t.string :old_email, length: 513, null: false
+      t.string :new_email, length: 513, null: false
+      t.integer :old_email_token_id, null: true
+      t.integer :new_email_token_id, null: true
+      t.integer :change_state, null: false
+      t.timestamps null: false
+    end
+
+    add_index :email_change_requests, :user_id
+  end
+end

db/migrate/20160308193142_rename_confirm_translation_key.rb

@@ -0,0 +1,8 @@
+class RenameConfirmTranslationKey < ActiveRecord::Migration
+  def change
+    execute "UPDATE translation_overrides SET translation_key = 'user_notifications.confirm_new_email.subject_template'
+               WHERE translation_key = 'user_notifications.authorize_email.subject_template'"
+    execute "UPDATE translation_overrides SET translation_key = 'user_notifications.confirm_new_email.text_body_template'
+               WHERE translation_key = 'user_notifications.authorize_email.text_body_template'"
+  end
+end