tomcat guidance

developers.html

@@ -1981,7 +1981,6 @@ netbeans_jdkhome="C:\Program Files\Java\jdk1.8.0_221"</pre>
               Tomcat manager (used by
               <a href="https://savage.nps.edu/X3dValidator">X3D&nbsp;Validator</a>
               and other tools)
-              (TODO restrict to NPS intranet access?)
           </li>
           <li>
               <a href="https://modelexchange.nps.edu">https://modelexchange.nps.edu</a>
@@ -2379,11 +2378,32 @@ netbeans_jdkhome="C:\Program Files\Java\jdk1.8.0_221"</pre>
               <a href="https://en.wikipedia.org/wiki/Apache_Tomcat" target="_blank">Wikipedia: Apache Tomcat</a>
               provides an excellent summary of available capabilities.                  
           </li>
+          <li>
+              Jason Brittain with Ian F. Darwin, 
+              <a href="https://datacadamia.com/tomcat/logon" target="_blank">Tomcat: The Definitive Guide</a>, 
+              2nd Edition, O'Reilly Media, 2008.
+          </li>
           <li>
               <a href="https://datacadamia.com/tomcat/logon" target="_blank">Datacadamia: how to log in</a> includes configuration guidance.
           </li>
       </ul>
-      
+      <p>
+          Example information for <i>conf/tomcat-users.xml</i> configuration file follows.
+          Note that any username must also be configured in the Tomcat installation itself.
+      </p>
+<pre>
+&lt;role rolename="admin"/&gt;
+&lt;role rolename="admin-gui"/&gt;
+&lt;role rolename="admin-script"/&gt;
+&lt;role rolename="manager-gui"/&gt;
+&lt;role rolename="manager-script"/&gt;
+
+&lt;user username="moi" password="no-really" roles="admin,admin-gui,admin-script,manager-gui,manager-script" /&gt;
+</pre>
+      <p>
+          Under Windows operating system, better results have been obtained when installing Tomcat as local user
+          rather than requiring administrator permissions.
+      </p>
       <!-- =========================================================== -->
 
       <h2>
@@ -2965,7 +2985,7 @@ which can lead to the Internet of Things becoming the Web of Things. </i>
             <a href="https://savage.nps.edu/developers.html">https://savage.nps.edu/developers.html</a>
         </blockquote>
         <blockquote>
-            Revised 21 August 2020.
+            Revised 14 September 2020.
         </blockquote>
 
         <p>