[server/session] make commit/rollback obey ensure_cnx_set
Inside the ensure_cnx_set context manager, commit and rollback aren't
allowed to dispose of the cnxset.
#! /bin/sh -e#if [ "$1" = remove -o "$1" = upgrade ]; then if which install-docs >/dev/null 2>&1; then install-docs -r cubicweb-doc fifi#DEBHELPER#exit 0