hdf5

Merge pull request #1092 in HDFFV/hdf5 from ~DEROBINS/hdf5_der:develop to develop

* commit '931bd3aa6a7aa742d3a302b49eb20233b021f1bf':
  Added a RELASE.txt entry for HDFFV-10505.
  Changed 'deprecated' to indicate 'no longer supported' in the --enable-debug/production configure flags.