Merge pull request #2097 in HDFFV/hdf5 from ~NFORTNE2/hdf5_naf:tmp_112_2 to hdf5_1_12
* commit 'd567b4569df6e00c05d4290c7edfdf499f7d138f':
Add note to RELEASE.txt for H5Sselect_adjust.
Move checking for zero offset in selection adjust calls to the selection callbacks. This makes the procedure for checking it consistent across selection types and between _s and _u, ensures it is always is performed even when called within the H5S package, and removes the redundant check that would occur when callins H5S_select_adjust_s() from outside the H5S package.
Replace H5Sselect_adjust_u() and H5Shyper_adjust_s() with H5Sselect_adjust. Implement "adjust_s" callback for all selection types. Add range checking to H5Sselect_adjust().
