in order to handle POA creation on demand.
<li>
There were some POA objects in a typical server that are not freed up properly,
resulting in a memory leak. This has now been fixed.</li>

<li>
Timestamps in persistent IORs were not required and have been removed.</li>

<li>
POA exceptions are not not system exceptions and have been removed from
the list of system exceptions.</li>

<li>
Vastly improved the ability of the POA to deal with user exceptions, memory
allocation failures, and constructor failures.</