Print EOF or nil error

[wrfly]

go-zookeeper/zk/conn.go

Lines 510 to 512 in c4fab1a

	if err != nil || c.logInfo {
	c.logger.Printf("Send loop terminated: err=%v", err)
	}

go-zookeeper/zk/conn.go

Lines 525 to 527 in c4fab1a

	if err != io.EOF || c.logInfo {
	c.logger.Printf("Recv loop terminated: err=%v", err)
	}

I don't think it's OK to print the EOF error or nil error only because the logInfo flag, since the message won't help.