hdf5

Merge pull request #2521 in HDFFV/hdf5 from ~DEROBINS/hdf5_der:develop_minor to develop

* commit '9ecca22dd1852145810280e8c54aa6b0ab26b604':
  Fixed problems with S3 and HDFS VFDs. * Updated info struct parameter to correct info_string * Fixed Makefile.am where the S3 VFD was listed twice, causing   duplicated symbols errors.