$config['sess_driver'] = 'database';
$config['sess_cookie_name'] = 'sitename';
$config['sess_save_path'] = 'ci_sessions';
$config['sess_match_ip'] = TRUE;
$config['cookie_prefix'] = 'sitename_';
$config['cookie_domain'] = '.sitename.com';
$config['cookie_path'] = '/';
$config['cookie_secure'] = FALSE;
$config['cookie_httponly'] = FALSE;