instance method set_cookie

# File actionpack/lib/action_controller/response.rb, line 173
    def set_cookie(key, value)
      if value.has_key?(:http_only)
        ActiveSupport::Deprecation.warn(
          "The :http_only option in ActionController::Response#set_cookie " +
          "has been renamed. Please use :httponly instead.", caller)
        value[:httponly] ||= value.delete(:http_only)
      end

      super(key, value)
    end