CA-129239: Fix config file syncing

Signed-off-by: Jon Ludlam <jonathan.ludlam@citrix.com>

ocaml/xapi/config_file_sync.ml

@@ -57,7 +57,7 @@ let config_file_sync_handler (req: Http.Request.t) s _ =
   debug "received request to write out dom0 config files";
   Xapi_http.with_context "Syncing dom0 config files over HTTP" req s
     (fun __context ->
-      let uri = String.split '/' (req.Http.Request.uri) in
+      let uri = String.split '/' (req.Http.Request.uri) |> List.filter (fun x -> x <> "") in
       req.Http.Request.close <- true;
       debug "sending headers";
       Http_svr.headers s (Http.http_200_ok ~keep_alive:false ());