River routing failed for river names containing the river type.

Two rivers of type "myRiver" with name "myRiverOnNodeA" and "myRiverOnNodeB" can't be bound to node A or B by setting the configuration node.river to myRiverOnNodeA or myRiverOnNodeB. Both node.river strings contain the river type, and so every node could run the river. this is contrary to the description on http://www.elasticsearch.org/guide/reference/river/