This branch contained the changes in the maint-pool-3.2 that hadn't been
applied to the maint-3.2 branch.
The psycopg-pool code and tests in the maint-3.2 branch is now at the
same level of the maint-pool-3.2 branch but is much more modern, so
further psycopg-pool 3.2 will continue on this branch.