Offer no hand start for a walk that is only waiting its turn (issue 529)

A hand start there would skip its group's order; point at it only for a
walk nothing holds, and say why nothing holds it.

cmd/mesh-controller/delivery.go

@@ -89,20 +89,29 @@ func waitingSaid(p inventory.Plan, lines []stalledLine) string {
 	if len(lines) == 0 {
 		return waitingNote(p)
 	}
-	var held, other []string
+	var held, unheld, other []string
 	for _, l := range lines {
-		if l.State == "held" {
+		switch l.State {
+		case "held":
 			held = append(held, l.Says)
-		} else {
+		case "unheld":
+			unheld = append(unheld, l.Says)
+		default:
 			other = append(other, l.Says)
 		}
 	}
-	if len(held) > 0 {
+	switch {
+	case len(held) > 0:
 		return fmt.Sprintf("published; its walk waits for %s's word, and a delivery it carries is held for a person: %s",
 			p.Delivery.Awaits, strings.Join(held, "; "))
+	case len(other) > 0:
+		// Not at its turn: it goes when its turn comes. A hand start here would skip its group's order (review of
+		// novox/hq issue 529), so none is offered.
+		return fmt.Sprintf("published; its walk waits for %s's word: %s", p.Delivery.Awaits, strings.Join(other, "; "))
 	}
+	// Held by nothing: nothing will give it its word, so the hand start is the way on.
 	return fmt.Sprintf("published; its walk waits for %s's word: %s — `plans go %s --why …` starts it by hand",
-		p.Delivery.Awaits, strings.Join(other, "; "), p.ID)
+		p.Delivery.Awaits, strings.Join(unheld, "; "), p.ID)
 }
 
 // letGo gives a waiting walk its word: by the delivery's owner, or a person. The next advance asks its