hdf5_ep

[svn-r4482] Purpose:
    Kludge
Description:
    Since we're only about halfway through converting the internal use of
    property lists from the "old way" to the generic property lists, we turned
    off snapshots to avoid exposing lots of API changes to users, until the
    APIs settled down.

    Getting the snapshots rolling again seems to have become a priority, so
    some changes are going to have to be made now that were going to be
    postponed until we were completely finished with the conversion.  This
    requires that the old API functions be able to deal with both the old
    and new property lists smoothly.

Solution:
    Kludge together the property list code so that they can transparently handle
    dealing with both the old and new property lists

Platforms tested:
    FreeBSD 4.4 (hawkwind)