command line password is not always better than hard coded

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@676616 13f79535-47bb-0310-9956-ffa450edef68

docs/manual/OptionalTasks/sshexec.html

@@ -189,6 +189,9 @@ Invoke ant with the following command line:
 <pre>
     ant -Dusername=me -Dpassword=mypassword target1 target2
 </pre>
+which trades hard coded passwords for the possibility that any other
+user tracing processes on the machine running Ant (or reading your
+command shell's history) may now read the password.
 </p>
 </body>
 </html>