Make access-control domains an editable list, and stop saves eating the rule labels

The block is rebuilt from the parsed model on every save and the parser discarded comments,
so one press of Save deleted the five ## lines that are the only thing in the file saying
what each rule is for — which inline editing was about to make far easier to press.

Plugin/unraid/api/auth.php

@@ -131,7 +131,9 @@ $result = match ($action) {
     'lldap_add_to_group'      => vv_lldap_add_to_group($_POST['uid'] ?? '', (int)($_POST['gid'] ?? 0)),
     'lldap_remove_from_group' => vv_lldap_remove_from_group($_POST['uid'] ?? '', (int)($_POST['gid'] ?? 0)),
     // Authelia
-    'authelia_save'           => vv_authelia_write_rules(json_decode($_POST['rules'] ?? '[]', true) ?: [], $_POST['default_policy'] ?? 'deny'),
+    'authelia_save'           => vv_authelia_write_rules(json_decode($_POST['rules'] ?? '[]', true) ?: [],
+                                                         $_POST['default_policy'] ?? 'deny',
+                                                         $_POST['default_note']   ?? ''),
     default                   => ['ok' => false, 'error' => 'Unknown action: ' . $action],
 };