Sends additional logs to callstats.

Logs versions of components and library version. Logs shard and region if available.

JitsiConference.js

         video: undefined
     };
     this.isMutedByFocus = false;
+
+    // Lets send some general stats useful for debuging problems
+    var log = "";
+    if(window.jitsiProxyRegion)
+        log += "ProxyRegion:" + window.jitsiProxyRegion;
+    if(window.jitsiRegion)
+        log += (log.length > 0? ", " : "") + "Region: " + window.jitsiRegion;
+    if(window.jitsiShard)
+        log += (log.length > 0? ", " : "") + "Shard: " + window.jitsiShard;
+
+    if (log.length > 0)
+        Statistics.sendLog(log);
+
+    if(JitsiMeetJS.version)
+        Statistics.sendLog("LibJitsiMeet:" + JitsiMeetJS.version);
 }
 
 /**

connection_optimization/external_connect.js

             if (xhttp.status == HTTP_STATUS_OK) {
                 try {
                     var data = JSON.parse(xhttp.responseText);
+                    var headers = xhttp.getAllResponseHeaders();
+                    window.jitsiProxyRegion
+                        = xhttp.getResponseHeader('X-Proxy-Region');
+                    window.jitsiRegion
+                        = xhttp.getResponseHeader('X-Jitsi-Region');
+                    window.jitsiShard
+                        = xhttp.getResponseHeader('X-Jitsi-Shard');
                     success_callback(data);
                 } catch (e) {
                     error_callback(e);

modules/statistics/statistics.js

 
     try {
         this.rtpStats
-            = new RTPStats(peerconnection, 
+            = new RTPStats(peerconnection,
                     this.audioLevelsInterval, 2000, this.eventEmitter);
         this.rtpStats.start();
     } catch (e) {
     CallStats.sendUnhandledError(e, null);
 };
 
+/**
+ * Adds to CallStats an application log.
+ *
+ * @param {String} a log message to send
+ */
+Statistics.sendLog = function (m) {
+    // uses  the same field for cs stat as unhandled error
+    CallStats.sendUnhandledError(m, null);
+};
+
 /**
  * Sends the given feedback through CallStats.
  *

modules/version/ComponentsVersions.js

 var logger = require("jitsi-meet-logger").getLogger(__filename);
+var Statistics = require("../statistics/statistics");
 
 /**
  * The constant for the name of the focus component.
         return;
     }
 
+    var log = "";
     node.children.forEach(function(item){
 
         var componentName = item.attributes.name;
         if (this.versions[componentName] !== version) {
             this.versions[componentName] = version;
             logger.info("Got " + componentName + " version: " + version);
+
+            log += (log.length > 0? ", " : "")
+                + componentName + ": " + version;
         }
     }.bind(this));
+
+    // logs versions to stats
+    if (log.length > 0)
+        Statistics.sendLog(log);
 };
 
 /**