ref: disable lipsync by default

The LipSyncHack is currently broken in Jicofo and
will lead to unstable behavior.

doc/API.md

@@ -226,7 +226,7 @@ This objects represents the server connection. You can create new ```JitsiConnec
             - muc
             - anonymousdomain
         4. useStunTurn -
-        5. enableLipSync - (optional) boolean property which enables the lipsync feature. Currently works only in Chrome and is enabled by default.
+        5. enableLipSync - (optional) boolean property which enables the lipsync feature. Currently works only in Chrome and is disabled by default.
 
 2. connect(options) - establish server connection
     - options - JS Object with ```id``` and ```password``` properties.

modules/xmpp/moderator.js

@@ -214,7 +214,7 @@ Moderator.prototype.createConferenceIq = function() {
     elem.c(
         'property', {
             name: 'enableLipSync',
-            value: this.options.connection.enableLipSync !== false
+            value: this.options.connection.enableLipSync === true
         }).up();
     if (config.audioPacketDelay !== undefined) {
         elem.c(

modules/xmpp/xmpp.js

@@ -163,7 +163,7 @@ export default class XMPP extends Listenable {
         // this.caps.addFeature('urn:ietf:rfc:5576'); // a=ssrc
 
         // Enable Lipsync ?
-        if (browser.isChrome() && this.options.enableLipSync !== false) {
+        if (browser.isChrome() && this.options.enableLipSync === true) {
             logger.info('Lip-sync enabled !');
             this.caps.addFeature('http://jitsi.org/meet/lipsync');
         }