sshexec: document 'host'. Thanks to Gedge

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@276247 13f79535-47bb-0310-9956-ffa450edef68

docs/manual/OptionalTasks/sshexec.html

@@ -29,6 +29,11 @@ jsch-0.1.9 and won't work with versions of jsch earlier than
     <td valign="top"><b>Description</b></td>
     <td align="center" valign="top"><b>Required</b></td>
   </tr>
+  <tr>
+    <td valign="top">host</td>
+    <td valign="top">The hostname or IP adress of the remote host to which you wish to connect.</td>
+    <td valign="top" align="center">Yes</td>
+  </tr>
   <tr>
     <td valign="top">username</td>
     <td valign="top">The username on the remote host to which you are connecting.</td>