transformation

       <code>ap_log_*</code> without additional wrappers. In this way, the

       code will remain compatible with HTTPD 2.0 and 2.2.</p>

    <p>A <code>server_rec</code> pointer must be passed to 

       <code>ap_log_error()</code> when called after startup.  This

       was always appropriate, but there are even more limitations with

       a <code>NULL</code> <code>server_rec</code> in 2.4 than in

       previous releases.  Beginning with 2.3.12, the global variable

       <code>ap_server_conf</code> can always be used as

       the <code>server_rec</code> parameter, as it will be

       <code>NULL</code> only when it is valid to pass <code>NULL</code>

       to <code>ap_log_error()</code>.  <code>ap_server_conf</code>

       should be used only when a more appropriate <code>server_rec</code>

       is not available.</p> 

    <p>Consider the following changes to take advantage of the new

       <code>APLOG_TRACE1..8</code> log levels:</p>

       <ul>