fix a comment in config.layout which told the unsuspecting user

to use --with-layout instead of --enable-layout

PR:		9061
Submitted by:   Max Dittrich
Reviewed by:    Jeff Trawick


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@95088 13f79535-47bb-0310-9956-ffa450edef68