added us2 credit

git-svn-id: http://svn.linuxfromscratch.org/LFS/trunk/BOOK@978 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689

chapter01/acknowledgements.xml

@@ -52,6 +52,10 @@ www.ro.linuxfromscratch.org mirror.</para></listitem>
 Andrade</ulink> &lt;jason@dstc.edu.au&gt; for running the 
 www.au.linuxfromscratch.org mirror.</para></listitem>
 
+<listitem><para><ulink url="mailto:ian@wpi.edu">Ian 
+Cooper</ulink> &lt;ian@wpi.edu&gt; for running the 
+www.us2.linuxfromscratch.org mirror.</para></listitem>
+
 <listitem><para><ulink url="http://www.valinux.com">VA Linux
 Systems</ulink> who, 
 on behalf of <ulink url="http://www.linux.com">Linux.com</ulink>, donated