Read from 'path' to retain backward compatibility

builtin/audit/file/backend.go

@@ -19,9 +19,12 @@ func Factory(conf *audit.BackendConfig) (audit.Backend, error) {
 	}
 
 	path, ok := conf.Config["file_path"]
+	if !ok {
+		path, ok = conf.Config["path"]
 		if !ok {
 			return nil, fmt.Errorf("file_path is required")
 		}
+	}
 
 	// Check if hashing of accessor is disabled
 	hmacAccessor := true