if a port needs 2.x then set MODPY_VERSION=${MODPY_DEFAULT_VERSION_2}.
This commit doesn't change any versions currently used; it may be that
some ports have MODPY_DEFAULT_VERSION_2 but don't require it, those
should be cleaned up in the course of updating ports where possible.
Python module ports providing py3-* packages should still use
FLAVOR=python3 so that we don't have a mixture of dependencies some
using ${MODPY_FLAVOR} and others not.
oauth2.py is a script that can be used as a standalone utility for
generating and authorizing OAuth tokens, and for generating OAuth2
authentication strings from OAuth tokens.
This can be used with mutt to allow oauth2 logins to Gmail.
