From 846f8ec3d8a59155a187d54e45c668ca75057213 Mon Sep 17 00:00:00 2001
From: "Alexander A. Klimov" <alexander.klimov@icinga.com>
Date: Fri, 4 Nov 2016 17:31:52 +0100
Subject: [PATCH] ExternalBackendForm: set default username envvar explicitly

refs #12164
---
 .../forms/Config/UserBackend/ExternalBackendForm.php        | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/application/forms/Config/UserBackend/ExternalBackendForm.php b/application/forms/Config/UserBackend/ExternalBackendForm.php
index 61303b0f3..f178f53a2 100644
--- a/application/forms/Config/UserBackend/ExternalBackendForm.php
+++ b/application/forms/Config/UserBackend/ExternalBackendForm.php
@@ -57,11 +57,17 @@ class ExternalBackendForm extends Form
             )
         );
 
+        $hasRemoteUser = false;
         foreach (ExternalBackend::$remoteUserEnvvars as $envvar) {
             if (ExternalBackend::getRemoteUser($envvar) !== null) {
+                $hasRemoteUser = true;
                 break;
             }
         }
+        if (! $hasRemoteUser) {
+            $envvar = 'REMOTE_USER';
+        }
+
         $this->addElement(
             'text',
             'username_envvar',