fichier: Fix detection of Flood Detected error

Author: ncw

backend/fichier/api.go

@@ -61,7 +61,7 @@ func shouldRetry(ctx context.Context, resp *http.Response, err error) (bool, err
 			return false, err // No such user
 		case 186:
 			return false, err // IP blocked?
-		case 374:
+		case 374, 412: // Flood detected seems to be #412 now
 			fs.Debugf(nil, "Sleeping for 30 seconds due to: %v", err)
 			time.Sleep(30 * time.Second)
 		default: