Description:
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When making an HTTP request through the HTTP stream wrapper, there will 
be a duplicate \r\n sequence separating header lines and request body if 
the HTTP stream context option "header" is an array (which is possible 
since 5.2.10; it had to be a string with the individual, \r\n-separated 
header lines before that).

As a result, the last two bytes of the request will never reach the 
destination server, as it closes the connection when reaching the 
indicated Content-Length (which is off by two bytes due to the extra 
\r\n). The HTTP specification explicitly states that one \r\n sequence 
should be used to separate the last (\r\n-terminated) header line from 
the request body.

All is fine when supplying headers as a string instead of an array.

Reproduce code:
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$context = stream_context_create(array('http' => array('header' => array('X-Foo: bar', 'Content-Type: text/plain'), 'method' => 'POST', 'content' => 'ohai')));
$fd = fopen('http://127.0.0.1:12342/', 'rb', false, $context);

Expected result:
----------------
A \r\n after the last header, another \r\n to create a blank line, then 
"ohai"

Actual result:
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A \r\n after the last header, then \r\n twice which creates two blank 
lines, then "oh". "ai" never arrives as the Content-Length is reached.