add new local file for inclusion via ssi, intended for local variables describing the server

change analytics to pull from new collection jitsiAnalyticsPermanentProperties, which is to be user-defined via javascript in local.html

index.html

@@ -4,6 +4,7 @@
     <meta http-equiv="content-type" content="text/html;charset=utf-8">
     <meta name="viewport" content="width=device-width, initial-scale=1.0">
     <!--#include virtual="base.html" -->
+    <!--#include virtual="local.html" -->
     <script>
         window.indexLoadedTime = window.performance.now();
         console.log("(TIME) index.html loaded:\t", indexLoadedTime);

modules/analytics/analytics.js

@@ -122,16 +122,9 @@ class Analytics {
                 if (group) {
                     permanentProperties.group = group;
                 }
-
-                if (window.jitsiRegionInfo) {
-                    permanentProperties.ProxyRegion
-                        = window.jitsiRegionInfo.ProxyRegion;
-                    permanentProperties.Region 
-                        = window.jitsiRegionInfo.Region;
-                    permanentProperties.Shard
-                        = window.jitsiRegionInfo.Shard;
-                    permanentProperties.CrossRegion
-                        = window.jitsiRegionInfo.CrossRegion;
+                if (window.jitsiAnalyticsPermanentProperties) {
+                    permanentProperties.assign(
+                        window.jitsiAnalyticsPermanentProperties);
                 }
 
                 analytics.addPermanentProperties(permanentProperties);