[horde] error when communicating with the mail server after upgrade

[A. Schulze]

Andreas Mauser:

>  // $servers['advanced']['quota'] = ;
>  ...I cant get it together with the quota. What would be an example?

I have only these two lines and imp+dovecot play together:
$servers['imap']['quota']['driver'] = 'imap';
$servers['imap']['quota']['params']['unit'] = 'GB';

Andreas