index: set multiplex url

Signed-off-by: Sean Cross <sean@xobs.io>

index.html

@@ -679,6 +679,12 @@
 			// Factor of the display size that should remain empty around the content
 			margin: 0.1,
 
+			multiplex: {
+				url: '/ws/',
+				id: '000SOCKETID000',
+				secret: Reveal.getQueryHash().s || null
+			},
+
 			// Bounds for smallest/largest possible scale to apply to content
 			minScale: 0.02,
 			maxScale: 5.5,