title: Secured WebSocket does not work in Chrome58
body: <p>I have upgraded my Chrome to 58 and found the secured WebSocket isn't working any more, the console shows (WebSocket connection to 'wss://127.0.0.1:1234/' failed: Error in connection establishment: net::ERR_INSECURE_RESPONSE), I know Google has deprecated the SHA1 certificate, so created a new self-signed certificate with SHA256, but it still doesn't work, so is the self-signed cert not allowed in this scenario? (I'm using "new WebSocket("wss://127.0.0.1:1234")")</p>