Let git-clone/git-fetch follow HTTP redirections

Otherwise, git-clone silently failed to clone a remote
repository where redirections (ie. a response with a
"Location" header line) are used.

This includes the fixes from Nick Hengeveld.

Signed-off-by: Josef Weidendorfer <Josef.Weidendorfer@gmx.de>
Signed-off-by: Junio C Hamano <junkio@cox.net>

http-fetch.c

@@ -269,6 +269,8 @@ static CURL* get_curl_handle(void)
 				 curl_low_speed_time);
 	}
 
+	curl_easy_setopt(result, CURLOPT_FOLLOWLOCATION, 1);
+
 	return result;
 }