I'm finding http://initd.org/psycopg/license/ a bit confusing. Specifically: "If you prefer you can use the Zope Database Adapter ZPsycopgDA (i.e., every file inside the ZPsycopgDA directory) user the ZPL license as published on the Zope web site.".
Does the ZPL license apply to the entire psycopg project? Or just the the files under the ZPsycopgDA directory?