------------
Fix for:
HDFFV-8149: h5pset_external_f API - the offset is declared integer which can cause problem if use 64-bit integer
Added new type off_t, modified source files and added a new test.
Tested (jam, intel, gnu)
Removed using INT() on an already INTEGER variable on the input argument to the verify routine, which was causing wrong verify results for the two integers on a Mac.
Tested: fred (gnu) in production mode.
Items merged: fortran directory,
src/libhdf5.settings.in
configure.in configure
MANIFEST
Tested: (all platforms used by daily tests, both with --enable-fortran and --enable-fortran2003)