Why do <code>%U/%u</code> not work properly with <code>ExecOnConnect</code>?<br>
<font color=blue>Answer</font>: Both <code>%U</code> and <code>%u</code> will
be empty on <code>ExecOnConnect</code> because, at that point, the client has
done a TCP connect to the server, but has not sent any sort of information
(including user name).  Which means that <code>mod_exec</code> does not have
a user name to use at connect time.

<p>
One way to work around this limitation is to use a different trigger,
<i>e.g.</i>: