Convert "GET" requests to "CONNECT"

[mariuszste]

The idea is simple, when the options is set:

• parse any incoming HTTP requests
• extract the hostname and port
• CONNECT to the upstream proxy using the host/port
• send the http request over the tunnel and continue as normal

this would also resolve #15

[fnesveda]

Hi, unfortunately, due to low capacity in the team, we won't get to this anytime soon. But if this is an important feature for you, PRs are definitely welcome 🙂