update authie schema

db/migrate/20180216114344_add_host_to_authie_sessions.authie.rb

@@ -0,0 +1,6 @@
+# This migration comes from authie (originally 20180215152200)
+class AddHostToAuthieSessions < ActiveRecord::Migration[4.2]
+  def change
+    add_column :authie_sessions, :host, :string
+  end
+end