Commits

Merge pull request #1100 in HDFFV/hdf5 from ~LRKNOX/hdf5_lrk:hdf5_1_8_21 to hdf5_1_8_21 * commit '0db9e890a84d428a4b62a51fa73480cb54f915f4': Update INSTALL and INSTALL_parallel files to remove references to ancient systems and add generic steps for building HDF5 on HPC clusters. Update various INSTALL files for 1.8.21 release.