+/**
+ * dofindpath - Given 2 keys displays a path between them.
+ * @have: The key we have.
+ * @want: The key we want to get to.
+ * @html: Should we output in html.
+ *
+ * This does a breadth first search on the key tree, starting with the
+ * key we have. It returns as soon as a path is found or when we run out
+ * of keys; whichever comes sooner.
+ */
+void dofindpath(uint64_t have, uint64_t want, bool html);