New config option to use an external websocket server

config.js.dist

@@ -50,6 +50,12 @@ module.exports = {
      */
     //websocketPort: 3000,
 
+    /*  if you want to run a different version of cryptpad but using the same websocket
+     *  server, you should use the other server port as websocketPort and disable 
+     *  the websockets on that server
+     */
+    //useExternalWebsocket: false,
+
     /*  If Cryptpad is proxied without using https, the server needs to know.
      *  Specify 'useSecureWebsockets: true' so that it can send
      *  Content Security Policy Headers that prevent http and https from mixing