added missing comma

git-svn-id: http://svn.linuxfromscratch.org/LFS/trunk/BOOK@1283 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689

appendixa/nettools-desc.xml

@@ -2,7 +2,7 @@
 <title>Contents</title>
 
 <para>The Net-tools package contains the arp, hostname, ifconfig, netstat, 
-plipconfig rarp, route, and slattach programs.</para>
+plipconfig, rarp, route, and slattach programs.</para>
 
 </sect2>