Merge pull request #1708 in HDFFV/hdf5 from ~BRTNFLD/hdf5_msb:H10621 to develop
* commit '0742c15fca95965ed4eb87c6d54f41bb07bd4526':
makefile clean-up
move the vol_info to an optional parameter
added H5Pset_vol
added vol connector
added test for vol_connector
removed H5VL constants
removed VOLL NULL connector and replaced it with native VOL
added connector_name test
added missing files
add tests
added more tests
added missing files
Implemented VOL APIs and C constants, no tests
Implemented VOL APIs and C constants, no tests
initial API impl.
