FIX Log in as someone else returns user back to login screen

src/Security/MemberAuthenticator/LogoutHandler.php

@@ -109,6 +109,6 @@ class LogoutHandler extends RequestHandler
             return $this->redirect($backURL);
         }
 
-        return $this->redirect(Director::absoluteBaseURL());
+        return $this->redirect(Security::config()->get('login_url'));
     }
 }

tests/behat/features/login.feature

@@ -25,3 +25,11 @@ Feature: Log in
     When I press the "Log out" button
     And I go to "/admin/"
     Then I should see a log-in form
+
+  Scenario: Log in as someone else
+    Given I am logged in with "ADMIN" permissions
+    When I go to "/Security/login"
+    Then the response should contain "Log in as someone else"
+
+    When I press the "Log in as someone else" button
+    Then I should see a log-in form