Is it possible to connect to MySQL via a unix socket?
If so, what would be the exact db_dsnw example when my.cnf is set to...
socket = /var/run/mysqld/mysqld.sock
and my current config/db.inc.php contains...
$rcmail_config['db_dsnw'] = 'mysql://rcadmin:XXXXXXX@localhost/roundcubemail';