Add TLS support

[jorgeajimenezl]

TLS support for apps that not support http proxies

[jorgeajimenezl]

Exists some issue the hyper_tls::TlsStream<tokio::net::TcpStream> that broke the steram at Upgrade phase (see

proxyswarm/src/main.rs

Line 310 in 669ae49

let tls_stream = try_or_error!(acceptor.unwrap().accept(stream).await, "TLS handshake error: {}");

).
Then:

• Review hyper_tls::TlsStream<tokio::net::TcpStream> to find issues in the implementation
• Fix it