From 3ac1cfec61bf3d8c44cb95dd115c8a545a9c697f Mon Sep 17 00:00:00 2001
From: Ilia Rostovtsev <ilia@rostovtsev.io>
Date: Wed, 1 Dec 2021 12:48:14 +0300
Subject: [PATCH] Fix an error `use of uninitialized value $user in
 concatenation`

---
 acl/acl-lib.pl | 1 +
 1 file changed, 1 insertion(+)

diff --git a/acl/acl-lib.pl b/acl/acl-lib.pl
index d0d9abc40..1fae546a6 100755
--- a/acl/acl-lib.pl
+++ b/acl/acl-lib.pl
@@ -1953,6 +1953,7 @@ return 1 if ($found >= 0);		# Already setup
 
 # Grant access to the user and path
 &lock_file(&get_miniserv_config_file());
+$user ||= '';
 push(@anon, "$path=$user");
 $miniserv->{'anonymous'} = join(" ", @anon);
 &put_miniserv_config($miniserv);