pub const OPTIONAL_POLICY: &[&str];Expand description
Policy files a node may or may not have been started with.
Absent, they are reported and not fatal: a node with no ACL is a node with no ACL, and a backup of it is complete without one. Reported at all because “the ACL is missing from the backup” and “there was no ACL” look identical in a restored directory, and only one of them is a disaster.