Add events for lock icon update

.gitignore

 deploy-local.sh
 .remote-sync.json
 lib-jitsi-meet.*
+npm-*.log

JitsiConferenceEventManager.js

                 JitsiConferenceEvents.ENDPOINT_MESSAGE_RECEIVED,
                 conference.getParticipantById(from), payload);
         });
+
+    this.chatRoomForwarder.forward(XMPPEvents.MUC_LOCK_CHANGED,
+        JitsiConferenceEvents.LOCK_STATE_CHANGED);
 };
 
 /**

JitsiConferenceEvents.js

      * Indicates that a message from another participant is received on
      * data channel.
      */
-    ENDPOINT_MESSAGE_RECEIVED:
-        "conference.endpoint_message_received"
+    ENDPOINT_MESSAGE_RECEIVED: "conference.endpoint_message_received",
+    /**
+     * Indicates that the room has been locked or unlocked.
+     */
+    LOCK_STATE_CHANGED: "conference.lock_state_changed"
 };
 
 module.exports = JitsiConferenceEvents;

modules/xmpp/ChatRoom.js

     this.phonePin = null;
     this.connectionTimes = {};
     this.participantPropertyListener = null;
+
+    this.locked = false;
 }
 
 ChatRoom.prototype.initPresenceMap = function () {
     this.connection.flush();
 };
 
+ChatRoom.prototype.discoRoomInfo = function () {
+  // https://xmpp.org/extensions/xep-0045.html#disco-roominfo
+
+  var getInfo = $iq({type: 'get', to: this.roomjid})
+    .c('query', {xmlns: Strophe.NS.DISCO_INFO});
+
+  this.connection.sendIQ(getInfo, (result) => {
+    var locked = $(result).find('>query>feature[var="muc_passwordprotected"]').length;
+    if (locked != this.locked) {
+      this.eventEmitter.emit(XMPPEvents.MUC_LOCK_CHANGED, locked);
+      this.locked = locked;
+    }
+  }, (error) => {
+    GlobalOnErrorHandler.callErrorHandler(error);
+    logger.error("Error getting room info: ", error);
+  });
+};
+
 
 ChatRoom.prototype.createNonAnonymousRoom = function () {
     // http://xmpp.org/extensions/xep-0045.html#createroom-reserved
         }
     }
 
+    if (from==this.myroomjid && $(pres).find('>x[xmlns="http://jabber.org/protocol/muc#user"]>status[code="104"]').length) {
+      this.discoRoomInfo();
+    }
+
     if (txt) {
         logger.log('chat', nick, txt);
         this.eventEmitter.emit(XMPPEvents.MESSAGE_RECEIVED,

service/xmpp/XMPPEvents.js

     // Designates an event indicating that the MUC role of a participant has
     // changed.
     MUC_ROLE_CHANGED: "xmpp.muc_role_changed",
+    // Designates an event indicating that the MUC has been locked or unlocked.
+    MUC_LOCK_CHANGED: "xmpp.muc_lock_changed",
     // Designates an event indicating that a participant in the XMPP MUC has
     // advertised that they have audio muted (or unmuted).
     PARTICIPANT_AUDIO_MUTED: "xmpp.audio_muted",