Kafka non standard header encoding should be configurable

[fishman]

Description

As described in #56 you use AMQP encoding for the message headers. It's neither standard nor is it documented anywhere on azure.

Please provide a way to disable this encoding. Looking at the headers that are being added by the eventgrid subscription the encoding adds nothing but unnecessary bytes.

How to reproduce

Add an eventgrid -> eventhub subscription

Has it worked previously?

No

[KnyGoo]

+1

Reading Azure Event Hub with Spring Cloud Stream Kafka and I'm getting extra bytes that I was not expecting. Please decode so custom headers are clean.