Hi,

first thanks for this awesome software. But I have some trouble and I don't know how to proceed. First I try to find out what else I could provide for this report to be a good bug report.

First, I use the latest version (v1.14.0) from openSUSE build Service. I know, I should compile it by my self to avoid any other causes for this behavior. But for now I still use this package from there

在10.cluster章节中，第一段提到了“要了解TDengine 2.0的集群管理，需要对集群的基本概念有所了解，请看《TDengine整体架构》一章。”
为了便于用户理解，应该如后面所述的“《立即开始》”一样，为《TDengine整体架构》加上跳转链接。

《TDengine整体架构》这一章的链接如下：https://www.taosdata.com/cn/documentation/architecture

文档仓库如下：[10.cluster](https://github.com/taosdata/TDengine/blob/develop/documentation20/cn/10.cl

Relevant telegraf.conf:

[[outputs.graylog]]
  ## UDP endpoint for your graylog instances.
  servers = ["127.0.0.1:12201"]

Expected behavior:

Input plugin name field (e.g. "name":"log_tail") should be sent with _ prefix. Regarding Gelf specification (https://docs.graylog.org/en/4.1/pages/gelf.html#gelf-payload-specification), all non standard fields should always