http input ('in_http') does not document the useful and implemented `add_query_params` option

[Eliav2]

Describe the bug

the documentation of the http input plugin does not mention the add_query_params option, however, looking at the source code this option is implemented:

sending message to http://localhost:9880/mongo.my-new-inde444x3?el33iav=test555 will parse el33iav=test555 into "QUERY_EL33IAV":"test555" as a record as expected:

enabling the option add_query_params in the config works at worked at the latest td-agent and should be documented :

Link to the problematic documentation

https://docs.fluentd.org/input/http

Expected explanation

.

Additional context

No response

[github-actions]

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