From: Jeff Trawick ap_log_* without additional wrappers. In this way, the
code will remain compatible with HTTPD 2.0 and 2.2.
A server_rec pointer must be passed to
+ ap_log_error() when called after startup. This
+ was always appropriate, but there are even more limitations with
+ a NULL server_rec in 2.4 than in
+ previous releases. Beginning with 2.3.12, the global variable
+ ap_server_conf can always be used as
+ the server_rec parameter, as it will be
+ NULL only when it is valid to pass NULL
+ to ap_log_error(). ap_server_conf
+ should be used only when a more appropriate server_rec
+ is not available.
Consider the following changes to take advantage of the new
APLOG_TRACE1..8 log levels: