Use backend from glitch-soc for instance-only toots

db/migrate/20171210213213_add_local_only_flag_to_statuses.rb

@@ -0,0 +1,5 @@
+class AddLocalOnlyFlagToStatuses < ActiveRecord::Migration[5.1]
+  def change
+    add_column :statuses, :local_only, :boolean
+  end
+end

db/schema.rb

@@ -492,6 +492,7 @@ ActiveRecord::Schema.define(version: 2018_08_20_232245) do
     t.bigint "account_id", null: false
     t.bigint "application_id"
     t.bigint "in_reply_to_account_id"
+    t.boolean "local_only"
     t.index ["account_id", "id", "visibility", "updated_at"], name: "index_statuses_20180106", order: { id: :desc }
     t.index ["in_reply_to_account_id"], name: "index_statuses_on_in_reply_to_account_id"
     t.index ["in_reply_to_id"], name: "index_statuses_on_in_reply_to_id"