typo and comment

docs/source/index.rst

@@ -15,7 +15,7 @@
 Configuration variables:
 ========================
 
-Prebind
+prebind
 ========
 
 Use this option when you want to attach to an existing XMPP connection that was

main.js

@@ -1,7 +1,7 @@
 require(["jquery", "converse"], function($, converse) {
     converse.initialize({
         animate: true,
-        bosh_service_url: 'https://bind.opkode.im',
+        bosh_service_url: 'https://bind.opkode.im', // Please use this connection manager only for testing purposes
         prebind: false,
         xhr_user_search: false,
         auto_subscribe: false