add tree traversal code (new pf_tree_node->parent), dump states TAILQ and traverse a tree instead.
add tree traversal code (new pf_tree_node->parent), dump states TAILQ and traverse a tree instead.

orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars