Reviewed by: Brian Behlendorf

Submitted by:	John Line, WWW server manager <webadm@info.cam.ac.uk>

Fixed oversight in documentation of error_document.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@77306 13f79535-47bb-0310-9956-ffa450edef68