Making changes to portgroups

[Marcus Calhoun-Lopez]

Sometime in the future (after discussion is complete), I was hoping to commit a
change to the perl5 portgroup based on the discussion in #16830.
(http://trac.macports.org/ticket/16830)

I was also hoping to commit a python26 portgroup I have based on the
discussion in #16334.
(http://trac.macports.org/ticket/16334)

>From on #14553, it seems that any such change would have to wait until a
version update.
(http://trac.macports.org/ticket/14553)

Forgive my ignorance, but what is the correct and responsible procedure
for making such a change?
The documentation discusses how to change a Portfile, but I can not find
any information on making changes to the base.

Thank you,
Marcus