fix Curl error "transfer closed with ... bytes remaining to read" with HEAD HTTP method

[karneds]

Q	A
Documentation	no
Bugfix	yes
BC Break	no
New Feature	no
RFC	no
QA	no

Description

The HTTP HEAD method requests the headers that would be returned if the HEAD request's URL was instead requested with the HTTP GET method. For example, if a URL might produce a large download, a HEAD request could read its Content-Length header to check the filesize without actually downloading the file.

https://developer.mozilla.org/en-US/docs/Web/HTTP/Methods/HEAD

[Ocramius]

Thanks @karneds!