Changes touching this path

• a forge that cannot be reached, or that says no, stops answering with a message naming no request and a relay that was not in it, because both clients now send over one Endpoint that carries transport_failed's four-way diagnosis and knows which kind of host refused, collapsing four hand-kept endpoint lists into one (#1415) 21b9625e · dbf3dbe6…

Renames are not followed. loot's tree maps a path to an address, so a rename is a delete and an add. This list is the history of the name, not of the bytes.