[BALL] HashGridBox3: list -> forward_list Effectively, this is a cross-platform replacement for the previous GNU slist approach.
[BALL] HashGridBox3: list -> forward_list
Effectively, this is a cross-platform replacement for the previous GNU
slist approach.

tkemmer/ball,tkemmer/ball,tkemmer/ball,tkemmer/ball,tkemmer/ball,tkemmer/ball