Demo client for http AND https

[octopus-prime]

The demo client should have an easy to use method for sync-calls like

template <typename ResponseBody, typename RequestBody>
http::response<ResponseBody> execute(http::request<RequestBody> request);

The method looks at the scheme of the target url of the request.
If http then do http stuff.
If https then do https stuff.

Thanks :-)

[octopus-prime]

There is something like 'origin-form' of target, e.g. '/books/123'.
And frameworks like Quarkus do not accept the 'absolute-form' of target - they just return 404.
So the target url can't be complete and so has no scheme.
So the requested demo client can't be realized.