ref: Drops callStatsConfIDNamespace and uses only confID.

JitsiConference.js

         this.statistics = new Statistics(this.xmpp, {
             aliasName: this._statsCurrentId,
             userName: config.statisticsDisplayName ? config.statisticsDisplayName : this.myUserId(),
-            callStatsConfIDNamespace: this.connection.options.hosts.domain,
             confID: config.confID || `${this.connection.options.hosts.domain}/${this.options.name}`,
             siteID: config.siteID,
             customScriptUrl: config.callStatsCustomScriptUrl,

doc/API.md

     - `disableThirdPartyRequests` - if true - callstats will be disabled and the callstats API won't be included.
     - `enableAnalyticsLogging` - boolean property (default false). Enables/disables analytics logging.
     - `callStatsCustomScriptUrl` - (optional) custom url to access callstats client script
-    - `callStatsConfIDNamespace` - (optional) a namespace to prepend the callstats conference ID with. Defaults to the window.location.hostname
     - `disableRtx` - (optional) boolean property (default to false).  Enables/disable the use of RTX.
     - `disableH264` - (optional) boolean property (default to false).  If enabled, strips the H.264 codec from the local SDP.
     - `preferH264` - (optional) boolean property (default to false).  Enables/disable preferring the first instance of an h264 codec in an offer by moving it to the front of the codec list.

modules/statistics/statistics.js

  * callstats.
  * @property {string} aliasName - The alias name to use when initializing callstats.
  * @property {string} userName - The user name to use when initializing callstats.
- * @property {string} callStatsConfIDNamespace - A namespace to prepend the
- * callstats conference ID with.
  * @property {string} confID - The callstats conference ID to use.
  * @property {string} callStatsID - Callstats credentials - the id.
  * @property {string} callStatsSecret - Callstats credentials - the secret.
         if (!this.options.confID) {
             logger.warn('"confID" is not defined');
         }
-
-        if (!this.options.callStatsConfIDNamespace) {
-            logger.warn('"callStatsConfIDNamespace" is not defined');
-        }
     }
 
     /**
         = new CallStats(
             tpc,
             {
-                confID: this._getCallStatsConfID(),
+                confID: this.options.confID,
                 remoteUserID
             });
 
     return csInstances;
 };
 
-/**
- * Constructs the CallStats conference ID based on the options currently
- * configured in this instance.
- * @return {string}
- * @private
- */
-Statistics.prototype._getCallStatsConfID = function() {
-    // The conference ID is case sensitive!!!
-    return this.options.callStatsConfIDNamespace
-        ? `${this.options.callStatsConfIDNamespace}/${this.options.roomName}`
-        : this.options.roomName;
-};
-
 /**
  * Removes the callstats.io instances.
  */
             comment
         });
 
-    return CallStats.sendFeedback(this._getCallStatsConfID(), overall, comment);
+    return CallStats.sendFeedback(this.options.confID, overall, comment);
 };
 
 Statistics.LOCAL_JID = require('../../service/statistics/constants').LOCAL_JID;