CORBA26 — IANA ports for IIOP need to be documented in Ch 13 and 15

Chapter 15 (formal/99-07-19), page 15-51 last para of section 15.7.2, and
Chapter 13 (formal/99-07-17), page 13-36 last para, assert that "no 'well known'
ports have been allocated", and then proceeds to state that individual
implementations must use some unallocated port and document it.

The statement about "no well known port has been allocated" needs to be revised
to reflect that a well known port (683 for IIOP) has been allocated. Then we can
change the statement about what individual implementations are expected to do by
merely replacing the "must use some unallocated port" by a "may use the well
known port or may use some unallocated port and document it" or some such.

see below