[kronolith] How to disable Calendar Sharing?

[Chuck Hagenbuch]

Quoting Paul England <pengland at wxc.co.nz>:

> We currently use Horde and Kronolith for our Web Mail solution, we're a
> small sized ISP with ~10,000 users.
>
> Recently I have noticed that a user has shared their calendar and is
> available to all users,
>
> Can anyone assist me in disabling this feature?

You can turn off the DataTree support in Horde, but that will disable  
a number of things.

In Horde 3.2 there is a no_sharing configuration option  
($conf['share']['no_sharing'] that prevents users from changing  
permissions on their shares without disabling anything else.

-chuck