public function getSockets() {
        $sockets = array();
        $servers = Mage::helper('turpentine/data')->cleanExplode(PHP_EOL,
            Mage::getStoreConfig('turpentine_varnish/servers/server_list'));
        $key = str_replace('\n', PHP_EOL,
            Mage::getStoreConfig('turpentine_varnish/servers/auth_key'));
        $version = Mage::getStoreConfig('turpentine_varnish/servers/version');
        if ($version == 'auto') {
            $version = null;
        }
        foreach ($servers as $server) {
            $parts = explode(':', $server);
            $sockets[] = $this->getSocket($parts[0], $parts[1], $key, $version);
        }
        return $sockets;
    }