[libmicrohttpd] What is the `transfer_encoding` param in the MHD_PostDataIterator callback?

[silvioprog]

Hello listers,

The MHD_PostDataIterator documentation says:

transfer_encoding

  encoding of the data, NULL if not known;

Awesome. But, I don't know how to use this feature, so I have two questions:

. do I need to send some header in the x-www-form-urlencoded POST?

. do I need to send some header in the form-data POST?

Just to try to understand, I checked the `encoding` property of the `file` object in the NodeJS Multer plugin, however it always return only the `7bit` value.

Thanks in advance for any information!

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Silvio Clécio