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Firezone's ability to tunnel all traffic on a particular Client (i.e. the Internet Resource) means we have to ensure that traffic originating from within the Firezone process does not get routed back into the tunnel. On MacOS and iOS, this is automatically taken care of for us. On all other platforms, we need to take steps to prevent these routing loops. This functionality is abstracted away using our `SocketFactory`. A socket created with such a factory is guaranteed to route its traffic outside of the tunnel. These sockets are used for the WebSocket connection to the portal, as well as for recursive UDP and TCP DNS queries. In order to support DoH, we need to also be able to send HTTPS requests without causing packet loops. This PR adds a new crate `http-client` that does exactly that. It composes together `hyper` and `rustls` such that the configured `SocketFactory` is used to create the TCP socket for the underlying HTTP2 connection. Consequently, HTTPS requests made with this library will automatically be routed outside of the tunnel, assuming the `SocketFactory` is adequately configured. Right now, this crate just stands by itself. It will be integrated into connlib at a later point. Resolves: #10774 Related: #4668 Related: #10272