Comment 1 for bug 1448859

Related:
* Bug #170826 (sf1249910) “Move node along its path”
  https://bugs.launchpad.net/inkscape/+bug/170826

(If bug #170826 were implemented, a node could be inserted anywhere along the path, and then dragged along the path until it snaps to an intersection of the path with another path (or even to a self-intersection?))