Fix node rename problem
If rename node to '.' or '..', will cause problems 1、rename node to '.' 2、rename this node again 3、node's parent name changed 4、remove this node 5、node's parent has removed...
And not recommended use '/' for node name
If rename node to '.' or '..', will cause problems 1、rename node to '.' 2、rename this node again 3、node's parent name changed 4、remove this node 5、node's parent has removed...
And not recommended use '/' for node name