Purpose: HDFFV-8623
Description:
    Applied patch from user Jason Newton.  JIRA issue HDFFV-8623, patch
    9, improve c++ compatibility with exceptions.  All additions of "throw()"
    are included.  Exception::what() is not added because it is not necessary.
    It was suggested for the name, which follows stdlib.
Platforms tested:
    Linux/ppc64 (ostrich)
    Linux/32 2.6 (jam)
    Linux/64 2.6 (koala)/PGI compilers



git-svn-id: https://svn.hdfgroup.uiuc.edu/hdf5/trunk@24830 dab4d1a6-ed17-0410-a064-d1ae371a2980