allow hiding documentation menu for customers via customers-hide-option; use --staging for acme.sh for every test-CA

Signed-off-by: Michael Kaufmann <d00p@froxlor.org>

lib/config.example.inc.php

@@ -4,5 +4,11 @@
  * change the options below to either true or false
  */
 return [
-	'enable_webupdate' => false
+	/**
+	 * enable/disable the possibility to update froxlor from within the web-interface,
+	 * recommended value for debian/ubuntu package users is false to rely on apt and not have version mixup.
+	 * This is also useful for providers that manage the servers but give admin access to froxlor to handle
+	 * updates the way the providers does it (e.g. automation, etc.)
+	 */
+	'enable_webupdate' => false,
 ];