Make statistics reporting an opt-in option.
--- a/gui/babeldata.h
+++ b/gui/babeldata.h
@@ -64,7 +64,7 @@ public:
     upgradeOffers(0),
     runCount(0),
     startupVersionCheck(true),
-    reportStatistics(true),
+    reportStatistics(false),
     allowBetaUpgrades(false),
     ignoreVersionMismatch(true),
     disableDonateDialog(false),