Determine the right group for chown

[PadowYT2]

Describe the feature

This is based on https://github.com/NamelessMC/Nameless/blob/fcaa51708c23d592a92209d9ff7728f557070647/core/init.php#L43 basically, on CentOS, it is either nginx/apache and not www-data. Not sure if possible, but PHP should determine the right group

[Derkades]

get_current_user() should work