[horde] composite driver

[Ilya]

uuuhoo ;)
Thanks to you Chuck and Mike, I got it working. My main error was that I didnt
realize that function
function _horde_select_loginscreen() {
    return 'imp';
}
has to go into _config_ file, not in driver!!

once that worked, I also found out that in addition to what Mike sent me as
config  you need one more parameter there:
$conf['auth']['params']['drivers']['cyrsql']['driver'] = 'cyrsql';

here is my final config with cyrsql and imp:
conf['auth']['driver'] = 'composite';
$conf['auth']['params'] = array();
$conf['auth']['params']['drivers'] = array();
$conf['auth']['params']['app'] = 'imp';
$conf['auth']['params']['drivers']['imp'] = array();
$conf['auth']['params']['drivers']['imp']['driver'] = 'application';
$conf['auth']['params']['drivers']['imp']['params'] = array();
$conf['auth']['params']['drivers']['imp']['params']['app'] = 'imp';
$conf['auth']['params']['drivers']['cyrsql'] = array();
$conf['auth']['params']['drivers']['cyrsql']['driver'] = 'cyrsql';
$conf['auth']['params']['drivers']['cyrsql']['params'] = array();
$conf['auth']['params']['drivers']['cyrsql']['params']['phptype'] = 'mysql';
$conf['auth']['params']['drivers']['cyrsql']['params']['hostspec'] = ''; //sql hostname
$conf['auth']['params']['drivers']['cyrsql']['params']['protocol'] = 'tcp';
$conf['auth']['params']['drivers']['cyrsql']['params']['username'] = ''; //sql username
$conf['auth']['params']['drivers']['cyrsql']['params']['password'] = ''; //sql password
$conf['auth']['params']['drivers']['cyrsql']['params']['database'] = ''; //sql database
$conf['auth']['params']['drivers']['cyrsql']['params']['cyradmin'] = ''; //imap admin username
$conf['auth']['params']['drivers']['cyrsql']['params']['cyrpass'] = ''; //imap admin password
$conf['auth']['params']['drivers']['cyrsql']['params']['imaps'] = 
	'{localhost:993/imap/ssl/novalidate-cert}';//imap server
$conf['auth']['params']['admin_driver'] = 'cyrsql';
$conf['auth']['params']['loginscreen_switch'] = '_horde_select_loginscreen';
$conf['auth']['params']['drivers']['cyrsql']['loginscreen_switch'] = '_horde_select_loginscreen';

function _horde_select_loginscreen() {
    return 'imp';
}