Step back from a rendered resolver file only, and compare a declared path cleaned (issue 412, review 80)

A resource on the resolver file was left out by the check and still composed by the declaration, so an
uplink declaring it as a resource beside the resolver passed with two writers; it is refused again, as
before. And /etc//hosts or /etc/../etc/hosts is /etc/hosts to the machine, so it is compared cleaned.
A seat names no root or top-level directory.

internal/catalogue/node_resolver.go

@@ -1,5 +1,7 @@
 package catalogue
 
+import "path"
+
 // The machine's own resolver (novox/hq ADR 0247).
 //
 // **Most machines have none.** Every machine lists the mesh's resolvers in /etc/resolv.conf and nothing
@@ -66,10 +68,13 @@ func holdsSeat(m Manifest, seat string) bool {
 	return false
 }
 
-// stepsBack is the module as it composes among the modules of one machine (novox/hq ADR 0287, ADR 0247):
+// stepsBack is the module as it composes among the modules of one machine (novox/hq ADR 0287,
+// ADR 0247):
 // **where it holds a seat that names a path stepping back for another seat, and that other seat's holder
-// is on the machine and declares the path, its own declaration of the path is left out**, and nothing else
-// of it changes. The stepping back is the seat's definition — node-uplink stepping back from the resolver
+// is on the machine and declares the path, its own rendering of the path is left out**, and nothing else
+// of it changes. Only a file the mesh renders for it steps back, as before: a resource on the path is
+// composed as declared (the declaration copies a module's resources whole), so an uplink holder declaring
+// the resolver file as a resource beside the resolver's holder is two owners of one path, and refused. The stepping back is the seat's definition — node-uplink stepping back from the resolver
 // file for node-resolver — so any other module declaring the path beside the owner's is still two owners
 // of one path, and is refused as before.
 func stepsBack(m Manifest, modules []Manifest) Manifest {
@@ -95,20 +100,12 @@ func stepsBack(m Manifest, modules []Manifest) Manifest {
 	}
 	facts := make(map[string]RosterFile, len(m.Facts))
 	for name, f := range m.Facts {
-		if !f.Home && drop[f.Path] {
+		if !f.Home && drop[path.Clean(f.Path)] {
 			continue
 		}
 		facts[name] = f
 	}
 	m.Facts = facts
-	var resources []map[string]any
-	for _, r := range m.Resources {
-		if p, ok := r["path"].(string); ok && drop[p] {
-			continue
-		}
-		resources = append(resources, r)
-	}
-	m.Resources = resources
 	return m
 }