auth_identity: added section id in docbook and common xml tag

modules/auth_identity/doc/auth_identity.xml

@@ -1,8 +1,15 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE section PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
-   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
-
-<section>
+<!DOCTYPE section PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" 
+	"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd"
+	[ <!ENTITY % local.common.attrib
+	 "xmlns:xi CDATA #FIXED 'http://www.w3.org/2001/XInclude'">
+	 <!-- Include general documentation entities -->
+	 <!ENTITY % docentities SYSTEM "../../../docbook/entities.xml">
+	 %docentities;
+	]
+>
+
+<section id="auth_identity" xmlns:xi="http://www.w3.org/2001/XInclude">
     <sectioninfo>
 	<authorgroup>
 	    <author>