Refactored singletons to enable proper deconstruction during shutdown

src/server/authserver/Main.cpp

@@ -99,9 +99,9 @@ int main(int argc, char** argv)
         return 1;
 
     // Get the list of realms for the server
-    sRealmList.Initialize(_ioService, sConfigMgr->GetIntDefault("RealmsStateUpdateDelay", 20));
+    sRealmList->Initialize(_ioService, sConfigMgr->GetIntDefault("RealmsStateUpdateDelay", 20));
 
-    if (sRealmList.size() == 0)
+    if (sRealmList->size() == 0)
     {
         TC_LOG_ERROR("server.authserver", "No valid realms specified.");
         return 1;