reference the correct Wiki doc for both install and upgrade

www/software.php3

@@ -19,14 +19,14 @@ PAGEHEADER("Emulab Software Distributions");
 <li> <img src="/new.gif" alt="&lt;NEW&gt;">
     <a href="/downloads/emulab-080901.tar.gz">
     Emulab network testbed software</a>,
-    Version 5.0.0, released September 1, 2008.
-    This is an update of the 4.9.0 source release and should be considered
+    Version 5.0, released September 1, 2008.
+    This is an update of the 4.9 source release and should be considered
     the "official" Emulab release to be used for all fresh installs and
     upgrades.
     Includes source for everything except the GUI Client, which is available below.
     See the <a href = "README">README</a> and the
-    <a href = "http://users.emulab.net/trac/emulab/wiki/InstallDocs">
-    online installation documentation</a>.
+    <a href = "http://users.emulab.net/trac/emulab/wiki/InstallRoot">
+    online installation and upgrading documentation</a>.
     </li><p>
 
 <li> <a href="/downloads/emulab-080630.tar.gz">