#9 need to refactor $opt_* variables

[Danny Faught]

The variables set by NGetOpt use an old Perl 4 style
that requires ugly evals in the stress_driver code. The
NGetOpt call needs to be changed to return a hash
instead, and all $opt_* references need to be changed
to hash lookups.

I've done this before, but somehow the change was lost.

The "our" statement after the comment "# declare ugly
option variables" can be removed when this change is
complete.