[Zope] Replacement UserFolder

[Roy S. Rapoport]

I need to replace acl_users for a given folder (thankfully not the root)
with something that will read from a database AND do cookie-based
authentication (so HTML login screen, rather than basic auth).  SimpleUserFolder,
which was a snap to set up, doesn't seem to do the latter.
PluggableUserFolder 2.4.1 seemed to not like Zope 2.7.  A previous
workplace used GenericUserFolder, but it's rather obsolete.

Suggestions?

-roy