net.Conn wrapper for *websocket.Conn

[nhooyr]

At the moment, its impossible to create a proper net.Conn wrapper for *websocket.Conn as you cannot implement a SetDeadline method that interrupts a pending read without bricking the connection.

See golang/go#15224 for why a set deadline method that interrupts the connection is useful

[nhooyr]

Also see Azure/azure-service-bus-go#93

[nhooyr]

This is going to be pretty much impossible as if we have a large write or read, we cannot unblock it without bricking the connection because net/http only gives us a io.ReadWriteCloser for dials.

This idea overall seems rather janky. I can't think of when it's a good idea to actually run an arbitrary protocol over WebSocket's like this. If you want to run a protocol over HTTP, just use HTTP Connect. If you are for some reason limited to a browser, you probably shouldn't be running an arbitrary protocol over WebSocket's and this library won't really help you anyway because you're on the browser.