Thanks for considering contributing back :)
The best way is two parts:
1) open a pull request against the perlbal/Perlbal project on github.
2) e-mail this mailing list with a link to the pull request and a summary.
3) optionally your pulls will be in individual branches. This is more for
your own convenience; if you have two independent features or want to work
on a third, it's easiest to keep your "master" branch clear.
That said, we've (mostly hachi actually) been tossing tons of changes into
'master' over the last few days and intend to hurl a cut tomorrow. Make
sure you're up to date with this before submitting your pull request, for
best results :)
have fun,
-Dormando