Modify doco and example for btcwallet ws endpoint.

examples/btcwalletwebsockets/main.go

@@ -34,7 +34,7 @@ func main() {
 	}
 	connCfg := &btcrpcclient.ConnConfig{
 		Host:         "localhost:18332",
-		Endpoint:     "frontend",
+		Endpoint:     "ws",
 		User:         "yourrpcuser",
 		Pass:         "yourrpcpass",
 		Certificates: certs,

infrastructure.go

@@ -896,7 +896,7 @@ type ConnConfig struct {
 	Host string
 
 	// Endpoint is the websocket endpoint on the RPC server.  This is
-	// typically "ws" or "frontend".
+	// typically "ws".
 	Endpoint string
 
 	// User is the username to use to authenticate to the RPC server.