Commits
Merge pull request #227 in HDFFV/hdf5 from ~DEROBINS/hdf5_der:flush_vfd_fix to develop flush1/2 fix w/ non-SWMR VFDs + code overhaul * commit 'fcb7e204b568efb785f47153172147b83da5418a': Updated the flush1/2 test to not be a mess and to handle non-SWMR-enabled VFDs.