Revert "If it is not possible to reconnect properly a client to the pool, the connection with it is restarted."

This reverts commit ec4dd4337010b39aa49d52b653cfaa2c24320456.
Check if sent parameters on client.reconnect are correct. If not old ones are used.
Some pools are not using properly this method.
Adds "-b" option to specify a backup pool. In case connection with pool is lost, the backup pool (if defined) is used.
If the backup pool then fails, it tries to connect back to the original pool and so on.