Layout Merge in 4.x

Hello.
    I just upgraded to Apache 2 and am trying to figure out the syntax
for the configuration of the new mod layout.
    Are the LayoutMerge tags available?  Here is one of the many configs
for the virt hosts I am trying to convert:

    LayoutComment On
    LayoutMerge On
    LayoutMergeBeginTag <head*>
    LayoutMergeEndTag </body>
    LayoutFooter /include/first.inc.php
    LayoutMergeBeginTag <body*>
    LayoutMergeEndTag </body>
    LayoutHeader /include/header.inc.php
    LayoutFooter /include/footer.inc.php

    LayoutIgnoreURI *.txt
    LayoutIgnoreURI *.nolyt.*

    LayoutIgnoreURI /~*
    LayoutIgnoreURI /cgi-bin/*
    LayoutIgnoreURI /somedir/*

I tried appending "AddOutputFilter LAYOUT html", but that didn't seem to
make a difference.

Any help is much appreciated.

j