Update files

Before the server is shut down, the files required for the update are temporarily saved under:       

~\server\update\server\lib\                                   and
~\server\update\data\modules\update\

and then loaded from there when the server restarts.

When the update is successful, the directories are automatically removed.

If the update fails, the .jar and .fsm files remaining in the directories can be deleted manually.

The fs-update.jar file in the <FirstSpiritROOT>/server/update directory must not be removed.