The cookie’s port list.
- iOS 2.0+
- macOS 10.2+
- tvOS 9.0+
- watchOS 2.0+
The list of ports for the cookie, returned as an array of
NSNumber objects containing integers. If the cookie has no port list, the value of this property is
nil and the cookie will be sent to any port. Otherwise, the cookie is only sent to ports specified in the port list.