CPP12 — How to create a local object reference?

The text added by the CCM spec that describes LocalObject has no
information on how to portably create a local object reference. Since
we have ORB services, like the Security or Transaction service which
must create local object references, and since we have a goal that these
services should be portable as source code between ORBs, we need a
portable way to create a local object reference.

Proposal:

Add a static _create_reference() member function to local object
interface classes:

// IDL
local interface I

;

// C++

... I_ptr;

class I : ...

;

A programmer can then create a new local object reference portably:

class MyI : public I, public CORBA::LocalObject

;

I_var new_i = I::_create_reference(new MyI());

same as issue #4160