CORBA24 — servant_to_id

the following text in the spec could be made a bit clearer:

2. If the POA has the IMPLICIT_ACTIVATION policy and either the
POA has the MULTIPLE_ID policy or the specified servant is not
active, the servant is activated using a POA-generated Object Id
and the Interface Id associated with the servant, and that Object
Id is returned.

Although it is stated elsewhere that IMPLICIT_ACTIVATION requires SYSTEM_ID,
it wouldn't hurt to reflect this here too:

2. If the POA has the IMPLICIT_ACTIVATION policy and either the
POA has the MULTIPLE_ID policy or the specified servant is not
active and the POA has the SYSTEM_ID policy, the servant is
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
activated using a POA-generated Object Id
and the Interface Id associated with the servant, and that Object
Id is returned.

Another question:

What should be returned if the USER_ID policy is present?

The spec doesn't say. Given that we can't add a new user exception,
OBJ_ADAPTER seems appropriate.

Close with no change, since a POA cannot have IMPLICIT_ACTIVATION and USER_ID.