Ticket #50339: setup-check-if-behind-tls-termination-proxy.diff

wp-admin/setup-config.php

@@ -19 +19 @@
  */
 define( 'WP_SETUP_CONFIG', true );
 
+/**
+ * Detect whether we are running behind a TLS Termination Proxy.
+ */
+if ( $_SERVER['HTTP_UPGRADE_INSECURE_REQUESTS'] == 1) {
+        $_SERVER['HTTPS']='on';
+}
+
 /**
  * Disable error reporting
  *