Fix for "String could not be parsed as XML" in server part of aps installer.

Till Brehm

2015-03-06 27978b1082cf730da91a675b18bbe625f4c8cf39

 server/lib/classes/aps_installer.inc.php

@@ -555,6 +555,7 @@
         curl_setopt($conn[$i], CURLOPT_TIMEOUT, 0);
         curl_setopt($conn[$i], CURLOPT_FAILONERROR, 1);
         curl_setopt($conn[$i], CURLOPT_FOLLOWLOCATION, 1);
         curl_setopt($conn[$i], CURLOPT_SSL_VERIFYPEER, 0);

         curl_multi_add_handle($mh, $conn[$i]);
      }