vegbien.sql: Modified tree cross-link algorithm to add an "ancestor" for this node. This is useful for queries, because you don't have to separately test if the leaf node is the one you're looking for, in addition to that leaf node's ancestors.
vegbien.sql: Modified tree cross-link algorithm to add an "ancestor" for this node. This is useful for queries, because you don't have to separately test if the leaf node is the one you're looking for, in addition to that leaf node's ancestors.