We have a pool in this function, and log_error_core needs a pool in order

to open stderr successfully.  By using ap_log_perror, we can pass a valid
pool down to log_error_core


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@87561 13f79535-47bb-0310-9956-ffa450edef68