$NetBSD: patch-configure,v 1.6 2023/03/30 07:33:53 fox Exp $

Make the script portable.

--- configure.orig	2023-03-26 08:15:14.887955152 +0000
+++ configure
@@ -20935,7 +20935,7 @@ then
         then
                 as_fn_error $? "You need to enable both DTLS and TLSv1.3 to use DTLSv1.3" "$LINENO" 5
         fi
-        if test "x$ENABLED_SEND_HRR_COOKIE" == "xundefined"
+        if test "x$ENABLED_SEND_HRR_COOKIE" = "xundefined"
         then
                 { $as_echo "$as_me:${as_lineno-$LINENO}: DTLSv1.3 is enabled, enabling HRR cookie" >&5
 $as_echo "$as_me: DTLSv1.3 is enabled, enabling HRR cookie" >&6;}