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.
High-level cross-protocol url-grabber.
Using urlgrabber, data can be fetched in three basic ways:
urlgrab(url) copy the file to the local filesystem
urlopen(url) open the remote file and return a file object
(like urllib2.urlopen)
urlread(url) return the contents of the file as a string
ok aja@
