add a link to the wiki at appropriate places

svn path=/trunk/; revision=13053

docbook/eug_src/EUG_chapter_introduction.xml

@@ -385,7 +385,30 @@
       places that may be of interest to you (well, beside this guide of 
 	  course).
 	</para>
-	
+
+	<section id="ChIntroHomepage"><title>Website</title>
+    <para>
+	You will find lot's of useful information on the Ethereal homepage at
+	<ulink url="&EtherealWebSite;">&EtherealWebSite;</ulink>.
+	</para>
+	</section>
+
+	<section id="ChIntroWiki"><title>Wiki</title>
+    <para>
+	The Ethereal Wiki at <ulink 
+	url="&EtherealWikiPage;">&EtherealWikiPage;</ulink> provides a wide range 
+	of information related to Ethereal and packet capturing in general.
+	You will find a lot of information not part of this user's guide. For 
+	example, there is an explanation how to capture on a switched network, 
+	an ongoing effort to build a protocol reference and a lot more. 
+	</para>
+	<para>
+	And best of all, if you would like to contribute your knowledge on a 
+	specific topic (maybe a network protocol you know well), you can edit the 
+	wiki pages by simply using your webbrowser.
+	</para>
+	</section>
+
 	<section id="ChIntroFAQ"><title>FAQ</title>
     <para>
 	The "Frequently Asked Questions" will list often asked questions and 

docbook/eug_src/EUG_preface.xml

@@ -31,8 +31,9 @@
   </para>
   <para>
   This book is not intended to explain network sniffing in general and it will
-  not provide details about specific network protocols. However, as this book
-  evolves in time (like Ethereal itself), this might change in the future.
+  not provide details about specific network protocols. A lot of useful 
+  information regarding these topics can be found at the Ethereal Wiki at
+  <ulink url="&EtherealWikiPage;">&EtherealWikiPage;</ulink>
   </para>
   <para>
   By reading this book, you will learn how to install Ethereal, how to use the