Changing perlbug's default behavior

Since the issue tracker is now on GitHub and perlbug@perl.org does not open
issues, the perlbug utility must be updated to be more helpful. I've opened
a PR to this effect:

https://github.com/Perl/perl5/pull/17651

There are a couple use cases that I don't quite understand so I would
appreciate input from anyone who has used them or knows how they are used.
Namely, the -t option for testing, and the -ok/-nok options for build
reports.

-Dan

• Changing perlbug's default behavior by Dan Book