Say controller in the installer's and the token's words, as the glossary does

internal/bootstrap/enrol.go

@@ -170,17 +170,17 @@ const (
 //
 // **Genesis's own step** (novox/hq 04-ISSUES/146). Every account on the bus reaches it in the
 // declaration of the machine that runs it — which needs that machine to be an enrolled node, and at
-// genesis it is not. The control plane composes the list and says it; whoever raised the bus places
+// genesis it is not. The controller composes the list and says it; whoever raised the bus places
 // it. That is this installer: it carried the bus in its bundle, so it knows where the bus reads it,
-// and the control plane never has to.
+// and the controller never has to.
 func placeTheBusUsers(ctx context.Context, control controlPlane, say func(string)) error {
 	users, err := control.tell(ctx, "broker", "accounts")
 	if err != nil {
-		return fmt.Errorf("the control plane would not say the bus's users, so no machine could "+
+		return fmt.Errorf("the controller would not say the bus's users, so no machine could "+
 			"join it: %w", err)
 	}
 	if !strings.Contains(users, "accounts") {
-		return fmt.Errorf("the control plane's account of the bus's users is not one:\n%s", indent(users))
+		return fmt.Errorf("the controller's account of the bus's users is not one:\n%s", indent(users))
 	}
 	script := "umask 077 && cat > " + busAccounts + ".next <<'MESHBUSUSERS'\n" + users + "\nMESHBUSUSERS\n" +
 		"mv " + busAccounts + ".next " + busAccounts + " && docker kill -s HUP " + busContainer + " >/dev/null"