This is where most people will expect to find license information. The
COPYING_LBNL_HDF5 file has also been renamed to LICENSE_LBNL_HDF5.
The licenses are unchanged.
* Replace support.hdfgroup.org URLs for alternative COPYING file
locations in copyright headers with https://www.hdfgroup.org/licenses.
Replace support.hdfgroup.org URL for alternative COPYING_LBNL_HDF5
with github URL.
Tweak chkcopyright script for change from UICOPYRIGHTSTR to
THGCOPYRIGHTSTR.
Dana Robinson
Larry Knox
jhendersonHDF