[CORE] implemented multiple configuration files loading

currently it's used to load the default [auth|world]server.conf.dist

but you can use sConfigMgr->LoadMore to load your custom config

in your modules to add/overwrite properties

src/server/game/World/World.cpp

@@ -429,7 +429,7 @@ void World::LoadConfigSettings(bool reload)
     {
         if (!sConfigMgr->Reload())
         {
-            sLog->outError("World settings reload fail: can't read settings from %s.", sConfigMgr->GetFilename().c_str());
+            sLog->outError("World settings reload fail: can't read settings.");
             return;
         }