* pull changes from geth fork

* update deps

* remove unused: StartPath, SubtrieIteratorFactory

* change module name

@@ -44,0 +45,4 @@
+	// behavior would be to make this a strict less-than, so that iterators cover mutually disjoint
+	// subtries. Unfortunately, the NodeIterator constructor takes a compact path, meaning
+	// odd-length paths must be padded with a 0, so e.g. [8] becomes [8, 0], which means we would
+	// skip [8]. So, we use <= here to cover that node for the "next" bin.

@@ -77,1 +55,3 @@
-	ret = &Iterator{it, tr, iterSeekedPath, endPath}
+// Tracked wraps an iterator in a Iterator. This should not be called once halts are possible.
+func (tr *Tracker) Tracked(it trie.NodeIterator) (ret *Iterator) {
+	ret = &Iterator{it, tr}