doc: Update PAM documentation from DockBook 4 to DocBook 5

Changed files
--------------

Make.xml.rules.in:
- Using RNG file instead of DTD file for checking XML files.
- Taking the correct stylesheet for README files.

doc/sag/Makefile.am, doc/adg/Makefile.am, doc/mwg/Makefile.am:
- Using RNG file instead of DTD file for checking XML files.

configure.ac:
- Adding a new option for selecting RNG check file (-enable-docbook-rng)
- Switching stylesheets to docbook 5
- Checking DocBook 5 environment instead of DocBook 4 environment

*.xml:
Update from DockBook 4 to DocBook 5

1 files changed, 4 insertions, 8 deletions

diff --git a/doc/man/pam.conf-syntax.xml b/doc/man/pam.conf-syntax.xml
index 5112f930..c7d90081 100644
--- a/doc/man/pam.conf-syntax.xml
+++ b/doc/man/pam.conf-syntax.xml
@@ -1,8 +1,4 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE section PUBLIC "-//OASIS//DTD DocBook XML V4.1.2//EN"
-                   "http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd">
-
-<section id='pam.conf-syntax'>
+<section xmlns="http://docbook.org/ns/docbook" version="5.0" xml:id="pam.conf-syntax">
   <para>
     The syntax of the <filename>/etc/pam.conf</filename>
     configuration file is as follows. The file is made up of a list
@@ -18,7 +14,7 @@
     </para>
 
     <para>
-      <emphasis remap='B'> service  type  control  module-path  module-arguments</emphasis>
+      <emphasis remap="B"> service  type  control  module-path  module-arguments</emphasis>
     </para>
 
     <para>
@@ -411,7 +407,7 @@
       should use `\]'. In other words:
     </para>
     <programlisting>
-    [..[..\]..]    -->   ..[..]..
+    [..[..\]..]    --&gt;   ..[..]..
     </programlisting>
 
     <para>
@@ -424,4 +420,4 @@
       </citerefentry>.
     </para>
 
-</section>
+</section>
\ No newline at end of file