> What I am a bit unsure about is actually how things like "transfer-encoding: chunked" or the various "connection" headers are supposed to be handled in server

> What I am a bit unsure about is actually how things like "transfer-encoding: chunked" or the various "connection" headers are supposed to be handled in servers/clients/libraries that are supposed to handle HTTP/1.1 and HTTP/2 As you suspected these headers are 'special' and don't exist in HTTP/2.