1.5 Who makes cURL?
 1.6 What do you get for making cURL?

RFC 2616, section 9.4 says: "The HEAD method is identical to GET except that
the server MUST NOT return a message-body in the response."

was not used...

new locations on the same connection that was previously followed on

encoded letter (in curl_escape)

removed escape/unescape as they're now documented

allow this script to simply detect a gethostbyname_r() if it can't figure
out how to use it. From now on, this script will fail when that happens.