Merge pull request #32 in ZP/z-push from...

Merge pull request #32 in ZP/z-push from bugfix/ZP-670-autodiscover-use-http_response_code to develop

* commit 'd4524802':
  ZP-670 Use http_response_code. Released under the Affero GNU General Public License (AGPL) version 3.

(cherry picked from commit 35763ff2)

src/autodiscover/autodiscover.php

@@ -43,6 +43,7 @@
 
 include_once('../lib/core/zpushdefs.php');
 include_once('../lib/exceptions/exceptions.php');
+include_once('../lib/utils/compat.php');
 include_once('../lib/utils/utils.php');
 include_once('../lib/core/zpush.php');
 include_once('../lib/core/zlog.php');
@@ -120,7 +121,7 @@ class ZPushAutodiscover {
             else {
                 ZLog::Write(LOGLEVEL_ERROR, sprintf("Unable to complete autodiscover incorrect request: '%s'", $ex->getMessage()));
             }
-            header('HTTP/1.1 401 Unauthorized');
+            http_response_code(401);
             header('WWW-Authenticate: Basic realm="ZPush"');
         }
         catch (ZPushException $ex) {