修改日志写入文件内

conf/server.toml

@@ -9,8 +9,9 @@ db_file = "./data.db"
 cert_file = "./vpn_cert.pem"
 cert_key = "./vpn_cert.key"
 ui_path = "../ui"
-down_files_path = "../down_files"
-
+files_path = "../files"
+#日志目录,为空写入标准输出
+log_path = "../log"
 log_level = "info"
 
 #系统名称