Description:
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ext/curl is missing the constant CURLOPT_TCP_NODELAY (121)

Reproduce code:
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<?php
     $ch = curl_init('http://localhost');
     curl_setopt($ch, CURLOPT_TCP_NODELAY, 1);
?>


Expected result:
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the curl tcpnodelay() function is called and socket optiosn set.

Actual result:
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PHP Notice:  Use of undefined constant CURLOPT_TCP_NODELAY