How to make a non-blocking portal?

[mmosko]

Just looking at the header files and header doc and documentation/ directory, it is not possible to figure out what to do. ccnxPortalFactory_CreatePortal() take CCNxStackImpl and that takes CCNxPortalAttributes and that has ccnxPortalAttributes_NonBlocking, so I'd assume I have to do that.

But looking at the C code it looks like ccnxPortalFactory_CreatePortal() always adds ccnxPortalAttributes_NonBlocking to the stack.

So, it would be very helpful to clarify that all portals are non-blocking in the header doc.