Related to a point made in #1244

It would be nice if the initial websocket connection could have a user configurable timeout for the entire handshake (as opposed to just the initial TCP connection or the like). Sometimes I find that Cloudflare can stall a WebSocket connection, timing it out after a minute or so and that's undesirable for me, it would be nice if I could cancel the connection attempt earlier.

I'd envision this as an additional timeout parameter on http.websocketAsync and http.websocket similar to Websocket.receive.