Quixotix/PHP-PayPal-IPN — pull request #10 by mike182uk (2012-08-15 22:30:00+00:00)
Title: added host header for fsock

When using fsockopen to communicate with PayPal, was getting the following response back

````
HTTP/1.0 400 Bad Request
Server: BigIP
Connection: close
Content-Length: 19

Invalid Host header
```

Setting the host header fixes this issue