Add example of server based on new Hyper API (>=0.11.7)

[sanmai-NL]

The first parts of the new Hyper server API came in v0.11.7, i.e. server::Serve and Http::serve_connection.

I wonder how hyper-rustls fits with this. @P-E-Meunier explained in hyperium/hyper#1326 he is also looking for more control over the socket and transport without lots of complex code. Is somebody able to present an example here of combining hyper-rustls with the new server API?

[lucab]

@sanmai-NL you may want to have a look at https://github.com/ctz/hyper-rustls/pull/41/files#diff-bac3b8e7f9e4eb8c5c4f625b9ef7bd9b, which contains a hyper-0.12 server over tokio-rustls.

[sanmai-NL]

Yay! The current example code works fine with with hyper >= 0.12.