books.html update

Updates for books.html:

- Remove "OpenBSD specific" book describing OpenBSD 2.5 and IPFilter
- Link to fourth (latest) edition of "Computer Networks"

cc: me any comments since I don't subscribe to www@.

/Alexander

$ cvs diff -u books.html  
Index: books.html
===================================================================
RCS file: /cvs/www/books.html,v
retrieving revision 1.69
diff -u -r1.69 books.html
--- books.html  27 Apr 2007 13:15:34 -0000      1.69
+++ books.html  12 Jul 2007 11:39:37 -0000
@@ -74,15 +74,6 @@
 <dd>[<a href="https://https.openbsd.org/cgi-bin/order?B01=1&amp;B01%2b=Add">Order direct from the OpenBSD website International</a>]
 [<a href="https://https.openbsd.org/cgi-bin/order.eu?B01=1&amp;B01%2b=Add">Europe</a>]
 <p>
-<dt>
-<i>Building Linux and OpenBSD Firewalls</i>
-<dd>by Wes Sonnenreich, Tom Yates.
-<dd>
-This book describes the OpenBSD 2.5 installation process and the elementary management of the system firewalling tools.
-<dd>[<a href="http://www.amazon.com/exec/obidos/ISBN=0471353663/openbsdA/">Order
-from Amazon</a>]
-
-<p>
 <dt><a name="book5"><i>OpenBSD 4.0: A Crash Course</i></a> (PDF)
 <dd>by Jem Matzan
 <dd>ISBN 0-596-51015-2
@@ -412,7 +403,7 @@
 This book is an high-level guide to modern computer networking.  It presents
 a wide range of protocols, concepts, and technologies.  It covers technologies
 from fiber to wireless, LANs, Mobile IP, and a lot more.
-<dd>[<a href="http://www.amazon.com/exec/obidos/ISBN%3D0133499456/openbsdA/">Order from Amazon</a>]
+<dd>[<a href="http://www.amazon.com/exec/obidos/ISBN%3D0130661023/openbsdA/">Order from Amazon</a>]
 <p>
 <dt><i>DNS and BIND</i>
 <dd>by Paul Albitz and Cricket Liu