Add the ability to strip certain response headers #603
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This PR adds the ability to strip certain headers from the http response before giving it back to the client. This can also be useful in the scenario where you want to remove HTTP1.1 headers when the client makes an HTTP2 request to the ALB. The LWA makes an HTTP1.1 call to the process, so the server might send back headers like Connection. The LWA gives that back to the ALB which gives Connection back to the client, but the client might reject the response since you aren't supposed to send the Connection header back for HTTP2 requests.
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