Fix settings handler build

cmd/server/main.go

@@ -26,7 +26,7 @@ func main() {
 		"do not mark cookies Secure (plain-HTTP local testing only)")
 	flag.Parse()
 
-	db, err := server.OpenDB(*dbPath)
+	db, err := server.OpenStore(*dbPath)
 	if err != nil {
 		log.Fatalf("open db: %v", err)
 	}