Description:
------------
I wrote a test script fro memcache-3.0.0, but it seems not work correctly.

when set memcache.protocol to 'ascii', the output is:
ok: set, key-key_nmbccbbn
error: host-192.168.1.250 tcp_port-11211 udp_port-11200 error-Malformed VALUE header errnum-0
error: get, key-key_nmbccbbn
error: prepend, key-key_nmbccbbn
error: append, key-key_nmbccbbn
ok: now value is 
error: cas, key-key_nmbccbbn
ok: now value is 
error: increment, key-key_nmbccbbn
error: decrement, key-key_nmbccbbn
ok: now value is 
error: delete, key-key_nmbccbbn

when set memcache.protocol to 'binary', the output is:
error: host-192.168.1.250 tcp_port-11211 udp_port-11200 error-Network timeout errnum-0
error: set, key-key_ukdfwrwe
error: get, key-key_ukdfwrwe
error: prepend, key-key_ukdfwrwe
error: append, key-key_ukdfwrwe
ok: now value is 
error: cas, key-key_ukdfwrwe
ok: now value is 
error: increment, key-key_ukdfwrwe
error: decrement, key-key_ukdfwrwe
ok: now value is 
error: delete, key-key_ukdfwrwe

it seems that only set is succeed by 'ascii' protocol.

Reproduce code:
---------------
<?php
function getRandomString($prefix = '', $length = 8)
{
    $string = $prefix;
    for ($i = 0; $i < $length; $i++) {
        $string .= chr(rand(97, 122));  
    }
    return $string;
}

function failureCallback($host, $tcpPort, $udpPort, $error, $errnum)
{
    echo "error: host-$host tcp_port-$tcpPort udp_port-$udpPort error-$error errnum-$errnum<br />\n";
}

function testMemcache($memcache)
{    
    $key = getRandomString('key_');
    $value = getRandomString('value_');
    if (!$memcache->set($key, $value, 0, 60)) {
        echo "error: set, key-$key" . "<br />\n";
    } else {
        echo "ok: set, key-$key" . "<br />\n";
    }
    
    if (!($value = $memcache->get($key, $flags, $cas))) {
        echo "error: get, key-$key" . "<br />\n";
    } else {
        echo "ok: get, key-$key value-$value flags-$flags cas-$cas" . "<br />\n";
    }
    
    if (!$memcache->prepend($key, 'begin_')) {
        echo "error: prepend, key-$key" . "<br />\n";
    } else {
        echo "ok: prepend, key-$key" . "<br />\n";
    }
    if (!$memcache->append($key, '_end')) {
        echo "error: append, key-$key" . "<br />\n";
    } else {
        echo "ok: append, key-$key" . "<br />\n";
    }
    echo "ok: now value is " . $memcache->get($key) . "<br />\n";
    
    $value = getRandomString('value_');
    if (!$memcache->cas($key, $value, 0, 0, $cas)) {
        echo "error: cas, key-$key" . "<br />\n";
    } else {
        echo "ok: cas, key-$key value-$value cas-$cas" . "<br />\n";
    }
    echo "ok: now value is " . $memcache->get($key) . "<br />\n";
    
    $memcache->set($key, 7, 0, 60);
    if (!$memcache->increment($key)) {
        echo "error: increment, key-$key" . "<br />\n";
    } else {
        echo "ok: increment, key-$key" . "<br />\n";
    }
    if (!$memcache->decrement($key, 9)) {
        echo "error: decrement, key-$key" . "<br />\n";
    } else {
        echo "ok: decrement, key-$key" . "<br />\n";
    }
    echo "ok: now value is " . $memcache->get($key) . "<br />\n";
    
    if (!$memcache->delete($key)) {
        echo "error: delete, key-$key" . "<br />\n";
    } else {
        echo "ok: delete, key-$key" . "<br />\n";
    }
}

ini_set('memcache.protocol', 'binary');
$memcache = new MemcachePool();
$memcache->addServer('192.168.1.250', 11211, 11200);
$memcache->setFailureCallback('failureCallback');
testMemcache($memcache);
?>

Expected result:
----------------
I need UDP interface of memcache, but I found no message in README. How can I choose to use 'TCP' or 'UDP'?