hdf5_ep

[svn-r14008] Description:
	Minor comment & testing cleanups

Tested on:
	FreeBSD/32 6.2 (duty)
	FreeBSD/64 6.2 (liberty)
	Linux/32 2.6 (kagiso)
	Mac OS X/32 10.4.10 (amazon)
	Solaris/32 2.10 (linew)