File a2enflag of Package apache2.15845
#!/bin/bash
# Copyright 2005 Peter Poeml <apache@suse.de>. All Rights Reserved.
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
function usage() {
        echo "$(basename $0): enable/disable a flag in $var in $sysconf"
        echo
        echo "usage: $(basename $0) [-d] flag"
        echo
        echo "HTTPD_INSTANCE=<instance_name> environment variable can be used to specify"
        echo "apache instance (see README-instances.txt); sysconfig file is expected" 
        echo "at /etc/sysconfig/apache2@<instance_name> ."
        exit 1
}
unset instance_suffix
if [ -n "$HTTPD_INSTANCE" ]; then
  instance_suffix="@$HTTPD_INSTANCE"
fi
sysconf=/etc/sysconfig/apache2$instance_suffix
var=APACHE_SERVER_FLAGS
PATH="$PATH:/usr/bin:/usr/sbin:/usr/share/apache2"
if [ $# -lt 1 ]; then
        usage
fi
action=enable
case "$1" in 
-d) action=disable; shift;;
-*) usage;; 
esac
case $(basename $0) in 
a2disflag) action=disable;;
esac
flag=$1
if [ $action = enable ]; then
	sysconf_addword $sysconf $var $flag
	exit $?
else
	sysconf_addword -r $sysconf $var $flag
	exit $?
fi