pcg79/set_cookie_domain.rb

## set_cookie_domain.rb
  def call(env)
    host = env["HTTP_HOST"].split(':').first
    env["rack.session.options"][:domain] = custom_domain?(host) ? nil : "#{@default_domain}"
    @app.call(env)
  end
	def call(env)
	host = env["HTTP_HOST"].split(':').first
	env["rack.session.options"][:domain] = custom_domain?(host) ? nil : "#{@default_domain}"
	@app.call(env)
	end