hdf5

Merging in latest from upstream (HDFFV/hdf5:refs/heads/develop)

* commit 'd184e6db94163dcc8761182744a6c524a4850887':
  Removed unused H5MF functions and updated FUNC_ENTER macros and naming in H5MFsection.c.
  Correct script names
  Fix typo
  Minor H5FS tweaks.
  Put back CTRL-L chars
  Update support link
  Update text
  Valgrind fixed by checking for prefix_len of 0