[horde] Delegate ACL in Kronolith

[Steffen]

What is the ACL "delegate" in Kronolith used for?

http://lists.horde.org/archives/kronolith/Week-of-Mon-20120326/008094.html
seems to explain, that delegate is used for CalDAV only?

The codes in ./add.php says:

        if ($user != $GLOBALS['registry']->getAuth() &&
!$kronolith_calendar->hasPermission(Kronolith::PERMS_DELEGATE)) {

and $user is derived from the form data. If I share a calendar with only
DELEGATE to some user, that user cannot even see this calendar and
requires EDIT to add new or change existing events.

-- 
Steffen