Tell the resolver the machines, not the names the mesh merely serves

The map the control plane hands a resolution holds both: the machines, and every name
the mesh was told to route to whichever machine serves it. A container's hosts wants all
of it, so a routed name resolves to the proxy. A resolver's zones want only the machines:
told the mesh's suffix is its own it answers authoritatively for everything under it and
forwards none of it, so a routed name with the suffix appended — drive.example.test.internal
— is a name nobody will ever ask for, standing beside the machines and looking as real.

Found composing the resolver's first assignment on a live machine, before pushing it.
hq issue 111.

internal/catalogue/declaration.go

@@ -114,6 +114,14 @@ type Rendering struct {
 	// because which machines exist is a fact about the mesh.
 	Names map[string]string
 
+	// Machines is only the machines, by the same internal name — the subset of Names that is a
+	// node of this mesh rather than a name it was told to serve. Both matter and they are not the
+	// same set: a container's hosts wants every name, so a routed name resolves to the proxy that
+	// serves it, while a resolver told the mesh's suffix is authoritative for it answers from what
+	// it is given and forwards nothing — so a routed name written there is a name nobody asks for,
+	// standing beside the machines and looking as real as they do.
+	Machines map[string]string
+
 	Settings   SettingsBy
 	Generators map[string]Generator
 	// Grants are the credentials this node must create, for the provisions it offers. Passed in
@@ -604,7 +612,7 @@ func (r Resolution) compose(with Rendering, owner map[string]string) ([]map[stri
 		// plane's; making a name resolve is the module's software. Emitted as ordinary files under
 		// this module's name, so they are applied, reported and removed exactly as anything else
 		// it declares.
-		given, err := FactsInto(m, r, with.Names, with.Suffix)
+		given, err := FactsInto(m, r, with.Names, with.Machines, with.Suffix)
 		if err != nil {
 			return nil, err
 		}