Split out postgresql-python port on to bunch of PostgreSQL version-dependent
so the packages can be built with different versions of PostgreSQL. The patch is
from crees@ with couple additions from me. It has some problems that prevents
build with python3, but it was decided that it's better to add this as starting
point. Maintainership of this port also was passed to pgsql@ team.
Reported by: many
Approved by: pgsql (crees)