api2/admin/datastore: accept "/" as path for root

makes more sense than sending "root'"

Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>
Signed-off-by: Stefan Reiter <s.reiter@proxmox.com>

src/api2/admin/datastore.rs

@@ -1328,7 +1328,7 @@ pub fn catalog(
 
     let mut catalog_reader = CatalogReader::new(reader);
 
-    let path = if filepath != "root" {
+    let path = if filepath != "root" && filepath != "/" {
         base64::decode(filepath)?
     } else {
         vec![b'/']