* Fixed round_cluster_addnode() to use round_node_ring_add().
* Fixed round_cluster_addnode() to use round_node_ring_add().

cybergarage/round-common,cybergarage/round,cybergarage/round-common,cybergarage/round-common,cybergarage/round,cybergarage/round,cybergarage/round-common,cybergarage/round