Re: [PATCH] clean.c, ls-files.c: respect encapsulation of exclude_list_groups

Adam Spiers [off-list ref] writes:

Consumers of the dir.c traversal API should avoid assuming knowledge
of the internal implementation of exclude_list_groups.  Therefore
when adding items to an exclude list, it should be accessed via the
pointer returned from add_exclude_list(), rather than by referencing
a location within dir.exclude_list_groups[EXC_CMDL].

Sounds sensible.