hdf5_ep

[svn-r16440] Description:
        Bring r16435 from revise_chunks branch back to 1.8 branch:

        Expand object copy tests for chunked datasets to include 1-D datasets
with an unlimited dimension.  (Fix typo in comment for test/links.c)

Tested on:
        FreeBSD/32 6.3 (duty) in debug mode
        (more thoroughly tested already on revise_chunks branch)