[horde] Hook to show only certain users

[Fabio Pietrosanti (naif)]

Vilius Šumskas wrote:
>> Can you set the acl's cross-domain for 2 virtual domains on your
>> machine ?
>>     
>
> Ah, yes you are right. Same error here on 2 virtual domains.
>   
Cross domain ACL are still not supported by Cyrus because of security
reasons.

I had this trouble some months ago that required me to do some in depth
changes of my email application because of this cyrus limitation... :\