support larger upload sizes for users with premium accounts

lib/historyKeeper.js

@@ -43,6 +43,7 @@ module.exports.create = function (config, cb) {
         //historyKeeper: config.historyKeeper,
         intervals: config.intervals || {},
         maxUploadSize: config.maxUploadSize || (20 * 1024 * 1024),
+        premiumUploadSize: false, // overridden below...
         Sessions: {},
         paths: {},
         //msgStore: config.store,
@@ -70,6 +71,13 @@ module.exports.create = function (config, cb) {
         domain: config.domain
     };
 
+    (function () {
+        var pes = config.premiumUploadSize;
+        if (!isNaN(pes) && pes >= Env.maxUploadSize) {
+            Env.premiumUploadSize = pes;
+        }
+    }());
+
     var paths = Env.paths;
 
     var keyOrDefaultString = function (key, def) {