From 91ef504cad49dd5c710f53816306a935b0ecc29e Mon Sep 17 00:00:00 2001
From: Phil Pennock <pdp@exim.org>
Date: Thu, 2 Feb 2017 15:13:53 -0500
Subject: [PATCH] Spec docs for IDNA2008 support

---
 doc/doc-docbook/spec.xfpt | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/doc/doc-docbook/spec.xfpt b/doc/doc-docbook/spec.xfpt
index 2be1373b0..919b36a14 100644
--- a/doc/doc-docbook/spec.xfpt
+++ b/doc/doc-docbook/spec.xfpt
@@ -38680,6 +38680,12 @@ Exim has support for Internationalised mail names.
 To include this it must be built with SUPPORT_I18N and the libidn library.
 Standards supported are RFCs 2060, 5890, 6530 and 6533.
 
+.new
+If Exim is built with SUPPORT_I18N_2008 (in addition to SUPPORT_I18N, not
+instead of it) then IDNA2008 is supported; this adds an extra library
+requirement, upon libidn2.
+.wen
+
 .section "MTA operations" SECTi18nMTA
 .cindex SMTPUTF8 "ESMTP option"
 The main configuration option &%smtputf8_advertise_hosts%& specifies
-- 
2.25.1