Merging in latest from upstream (HDFFV/hdf5:refs/heads/develop)
* commit '7bf6d847ae36940f1b1147820356795c7764dbeb':
Remove incorrect comment.
Updated error stacks for h5dump testing.
Corrected comment in src/H5VLint.c, fixed pass-through info size in src/H5VLpassthru.c, switched to stashing VOL connector ID & info in API context (in src/H5CX.c, src/H5CXprivate.h, src/H5F.c, src/H5Fint.c, and src/H5Fefc.c), patched up all sorts of issues in the tests, to make them work with 'check-vfd' (and 'check-vol' again).
Clean up style issues, make function callbacks static, correct debug statements, etc. No functionality changes at all.
