Description:
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PUT methods doesn't work with cURL 7.19.7 (CentOS 6.4) because of duplicated header "Content-Length". Nginx refuses to process request and sends "400 Bad Request". It works with cURL 7.36.0 (Windows 7) or 7.38.0-2 (Arch Linux).

Sent headers:
PUT /file.ico HTTP/1.1
User-Agent: PECL_HTTP/2.1.2 PHP/5.5.17 libcurl/7.19.7
Host: webdav.local
Accept: */*
Content-Length: 15086
Content-Length: 15086

Test script:
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<?php

$host = 'webdav.local';
$file = 'file.ico';

$data = file_get_contents($file);

$httpClient = new \http\Client();

$httpRequestBody1 = new \http\Message\Body();
$httpRequestBody1->append($data);

$httpRequest1 = new \http\Client\Request('PUT', $host . '/file.ico');
$httpRequest1->setHeader('Expect', '');
$httpRequest1->setBody($httpRequestBody1);

$httpClient->reset();
$httpClient->enqueue($httpRequest1);
$httpClient->send();
$httpResponse1 = $httpClient->getResponse();

echo sprintf("%s:%s\n", $httpResponse1->getResponseCode(), $httpResponse1->getResponseStatus()); 

Expected result:
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201:Created



Actual result:
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400:Bad Request