Handle python-specific PLIST in the standard way.
Import py33-flup-1.0.3pre1 as www/py-flup3.

flup is a collection of modules for the Python Web Server Gateway
Interface, including support for AJP 1.3, FastCGI and SCGI. It also
offers a basic middleware.

This package contains the 3.x version of the module.
Added www/py-flup3 version 1.0.3pre1
Mark as python-2.x version.
Support flup.
Use versioned_dependencies.mk for flup.