A) Fix for HDFFV-1238:
--Add 3 new options to allow users in setting threshold for small groups/datasets/attributes (tools/h5stat/h5stat.c)
--Generate new test file for testing the new options (tools/h5stat/h5stat_gentest.c)
--Add tests for the new options (tools/h5stat/testh5stat.sh.in)
--Update expected output files (tools/h5stat/testfiles/*.ddl)
B) Fix a bug in determining maximum dimension size for 1-D dataset in dataset_stats() (tools/h5stat/h5stat.c)
C) Fix a bug when using opt_arg that is NULL for the new options.
Bring r17313 from trunk to 1.8 branch:
Bring back various minor code cleanups from the file free space branch
Tested on:
FreeBSD/32 6.3 (duty) in debug mode
FreeBSD/64 6.3 (liberty) w/C++ & FORTRAN, in debug mode
Linux/32 2.6 (kagiso) w/PGI compilers, w/C++ & FORTRAN, w/threadsafe,
in debug mode
Linux/64-amd64 2.6 (smirom) w/Intel compilers w/default API=1.6.x,
w/C++ & FORTRAN, in production mode
Solaris/32 2.10 (linew) w/deprecated symbols disabled, w/C++ & FORTRAN,
w/szip filter, in production mode
Linux/64-ia64 2.6 (cobalt) w/Intel compilers, w/C++ & FORTRAN,
in production mode
Linux/64-ia64 2.4 (tg-login3) w/parallel, w/FORTRAN, in production mode
Linux/64-amd64 2.6 (abe) w/parallel, w/FORTRAN, in production mode
Mac OS X/32 10.5.8 (amazon) in debug mode
Mac OS X/32 10.5.8 (amazon) w/C++ & FORTRAN, w/threadsafe,
in production mode
