Clean up the string passed to the error log hook. This removes the date,

time, error level, etc strings.  The only information in the string is
the actual error.
Submitted by:	Jon Travis <jtravis@covalent.net>


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@91373 13f79535-47bb-0310-9956-ffa450edef68