Is it possible to have the --check-orphans parameter extended to list really *all* files in the games directory which do not belong to the game or - better - a custom set of extensions?
$ lgogdownloader --game ultima123 --check-orphans all
Currently this switch does check for a fixed set of extensions which cover possible downloads from GOG.com, but it would be kinda neat to obtain a list of all files which do not belong to the current GOG.COM game release in the game directory
This patch changes --check-orphans so that it sets regular expression filter (Perl syntax) for files to check. If no expression is given then the regex defaults to '.*\.(zip|exe|bin|dmg|old)$'