The patch changes the order that the config file and command line are
parsed so that command line has precedence.  It also adds a check to
make sure only one -E option is passed on the command line as -E option
parsing is not cumulative.

Signed-off-by: Jim Garlick <garlick@llnl.gov>
Signed-off-by: Andreas Dilger <adilger@sun.com>