Simple log to indicate the chosen IP Address for the default bridge

Signed-off-by: Madhu Venugopal <madhu@docker.com>

daemon/daemon_unix.go

@@ -445,6 +445,8 @@ func initBridgeDriver(controller libnetwork.NetworkController, config *Config) e
 			return err
 		}
 		ipamV4Conf.Gateway = ip.String()
+	} else if bridgeName == bridge.DefaultBridgeName && ipamV4Conf.PreferredPool != "" {
+		logrus.Infof("Default bridge (%s) is assigned with an IP address %s. Daemon option --bip can be used to set a preferred IP address", bridgeName, ipamV4Conf.PreferredPool)
 	}
 
 	if config.Bridge.FixedCIDR != "" {