1. Update to version 0.62. If you are doing uncommon things including
directly frobbing packets or calling Net::DNS::RR->new_from_data()
(which you should not be doing anyway) then you should read the changelog
carefully and review/test your code before committing to this version.
2. Remove support for old Perl.
Make this work on Perl 5.005.03 (ala RELENG_4) by installing
the bytes.pm pragma, which is the only thing that the new
version of Net::DNS needs from 5.6+ that isn't in 5.005.03.