Possible blocking connection even when connection_timeout is specified

[langemeijer]

In AbstractConnection::x_open()

the line

return $this->wait($wait)

should read:

$this->wait($wait,false,$this->connection_timeout);

Calling without timeout can cause an indefinite blocking connection. It is an edge-case, because two earlier wait() calls succeded, but it is still possible. (and will happen in race-condition situations)