add "netware" as possible value for the <os> condition.

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@269799 13f79535-47bb-0310-9956-ffa450edef68

docs/manual/CoreTasks/condition.html

@@ -99,6 +99,7 @@ are redundant and will be ignored.</p>
     Microsoft Windows and OS/2)</li>
   <li>mac (for all Apple Macintosh systems)</li>
   <li>unix (for all Unix and Unix-like operating systems)</li>
+  <li>netware</li>
 </ul>
 
 <h4>equals</h4>