Sends XML-RPC output to the browser.
string $xml: XML to send to the browser.
function xmlrpc_server_output($xml) {
$xml = '<?xml version="1.0"?>' . "\n" . $xml;
drupal_add_http_header('Content-Length', strlen($xml));
drupal_add_http_header('Content-Type', 'text/xml');
echo $xml;
drupal_exit();
}