# I needed a list's members to be private, so I added the code
# to restrict the "who" command if there is a file called 'list.private'
# in the list directory.
# Seems like Brent had something in mind for 'private' as it is
# treated similar to "closed".
Actually, that's backwards compatibility. Instead of "open" and
"closed" lists, they used to be called "public" and "private" lists.
When I changed to the "open" and "closed" terminology, I left
backwards-compatibility code in place to still recognize the old names.