https://github.com/gssapi/gssproxy/commit/d4004e67cb399054c07b34517e8f0eaee83c55de

From d4004e67cb399054c07b34517e8f0eaee83c55de Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Tomasz=20K=C5=82oczko?= <kloczek@github.com>
Date: Fri, 1 Sep 2023 18:19:23 +0000
Subject: [PATCH] upgrade xml DTD to 4.5
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Trival change which upgardes xml DTD version to latest stable 4.5.

Signed-off-by: Tomasz Kłoczko <kloczek@github.com>
--- a/man/gssproxy-mech.8.xml.in
+++ b/man/gssproxy-mech.8.xml.in
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE reference PUBLIC "-//OASIS//DTD DocBook V4.4//EN"
-"http://www.oasis-open.org/docbook/xml/4.4/docbookx.dtd">
+<!DOCTYPE reference PUBLIC "-//OASIS//DTD DocBook V4.5//EN"
+"http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd">
 <reference>
 <title>GssProxy GSSAPI mechanism manual page</title>
 <refentry>
--- a/man/gssproxy.8.xml
+++ b/man/gssproxy.8.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE reference PUBLIC "-//OASIS//DTD DocBook V4.4//EN"
-"http://www.oasis-open.org/docbook/xml/4.4/docbookx.dtd">
+<!DOCTYPE reference PUBLIC "-//OASIS//DTD DocBook V4.5//EN"
+"http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd">
 <reference>
 <title>GssProxy Manual pages</title>
 <refentry>
--- a/man/gssproxy.conf.5.xml
+++ b/man/gssproxy.conf.5.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE reference PUBLIC "-//OASIS//DTD DocBook V4.4//EN"
-"http://www.oasis-open.org/docbook/xml/4.4/docbookx.dtd">
+<!DOCTYPE reference PUBLIC "-//OASIS//DTD DocBook V4.5//EN"
+"http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd">
 <reference>
 <title>GssProxy Manual pages</title>
 <refentry>