First step in removing the fprintf(stderr problem from Apache. Basically,

First step in removing the fprintf(stderr problem from Apache.  Basically,
I defined APLOG_STARTUP, which refrains from printing the date string
and the log level information in log_error_core.  I then changed all the
fprintf(stderr calls to ap_log_error, and used APLOG_STARTUP.
log_error_core on Unix takes care of creating a log file and directing
it to stderr if a log file isn't already active.  I will continue to
make these changes tomorrow.  Currently, the main code and the dexter
mpm have been modified.

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@84134 13f79535-47bb-0310-9956-ffa450edef68