Commits
Merge pull request #2104 in HDFFV/hdf5 from ~NFORTNE2/hdf5_naf:tmp_112_3 to hdf5_1_12 * commit 'afb6ae776b3c60b37898dae4ee93f8976da90d42': Add H5VL_MAP_OPTIONAL operation id (unused currently).
Merge pull request #2104 in HDFFV/hdf5 from ~NFORTNE2/hdf5_naf:tmp_112_3 to hdf5_1_12 * commit 'afb6ae776b3c60b37898dae4ee93f8976da90d42': Add H5VL_MAP_OPTIONAL operation id (unused currently).