Allow the UNIX group to read the configuration file in production too;
Allow the UNIX group to read the configuration file in production too;

This allows sharing the config.ini file among a few UNIX users on the
same machine, which is convenient when you host several instances of
Kresus.

ZeHiro/kresus,ZeHiro/kresus,ZeHiro/kresus,bnjbvr/kresus,ZeHiro/kresus,bnjbvr/kresus,bnjbvr/kresus,bnjbvr/kresus