[client-connection] explicitly check that the client-connection is open
The check is also perform by the _srv_cnx property. But we do not need those
property anymore.
[system]
db-driver = postgres
db-host = localhost
db-port = 5433
adapter = native
db-name = cw_fti_test
db-encoding = UTF-8
db-user = syt
db-password = syt
[admin]
login = admin
password = gingkow