Description:
------------
PHP (or libcurl, I'm afraid I don't know where exactly the problem lies) seems to leak memory when using the same curl-handle for multiple requests.

The test script below reports the same memory_get_usage()-value for the first 300 requests and a 25% increase after but top(1) reports the memory grows up to 100MB when the script is done.

Uncommenting the resetting of CURLOPT_POSTFIELDS doesn't seem to help. Uncommenting the recreation of $ch prevents the memory from being leaked.

Test script:
---------------
<?php

	$ch = curl_init('http://some-domain.com/dump.html');
	for($i = 0; 1000 > $i; $i++) {
#		$ch = curl_init('http://some-domain.com/dump.html');
		$post = array();
		$post['data'] = base64_encode(str_repeat(hash('sha256', uniqid()), 1000));
		curl_setopt($ch, CURLOPT_POST, true);
		curl_setopt($ch, CURLOPT_POSTFIELDS, $post);
		curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
		curl_exec($ch);
		# curl_setopt($ch, CURLOPT_POSTFIELDS, '');
		if($i % 100 == 0) {
			var_dump(memory_get_usage(true));
		}
	}
?>