TYPO3 RealURL: Two sites in an installation, both with one domain per language

realurl_conf.php

<?php

$site1De = 'www.foo.de';
$site1DeWithPrefix = 'http://' . $site1De;
$site1Fr = 'www.foo.fr';
$site1FrWithPrefix = 'http://' . $site1Fr;
$site1It = 'www.foo.it';
$site1ItWithPrefix = 'http://' . $site1It;

$site2De = 'www.bar.de';
$site2DeWithPrefix = 'http://' . $site2De;
$site2Fr = 'www.bar.fr';
$site2FrWithPrefix = 'http://' . $site2Fr;
$site2It = 'www.bar.it';
$site2ItWithPrefix = 'http://' . $site2It;


$GLOBALS['TYPO3_CONF_VARS']['FE']['addRootLineFields'] .= ',tx_realurl_pathsegment,alias,nav_title,title';

$GLOBALS['TYPO3_CONF_VARS']['EXTCONF']['realurl'] = array(
    $site1De => array(
        'init' => array(
            'enableCHashCache' => true,
            'appendMissingSlash' => 'ifNotFile,redirect',
            'adminJumpToBackend' => true,
            'enableUrlDecodeCache' => true,
            'enableUrlEncodeCache' => true,
            'emptyUrlReturnValue' => '/'
        ),
        'pagePath' => array(
            'type' => 'user',
            //'disablePathCache' => true,
            'userFunc' => 'EXT:realurl/class.tx_realurl_advanced.php:&tx_realurl_advanced->main',
            'spaceCharacter' => '-',
            'languageGetVar' => 'L',
            'rootpage_id' => '1'
        ),
        'fileName' => array(
            'defaultToHTMLsuffixOnPrev' => 0,
            'acceptHTMLsuffix' => 0
        ),
        'preVars' => array(
            array(
                'GETvar' => 'L',
                'valueMap' => array(
                    'de' => 0,
                    'fr' => 1,
                    'it' => 2
                ),
                'valueDefault' => 'de',
                'noMatch' => 'bypass'
            )
        ),
        'postVarSets' => array(
            '_DEFAULT' => array(
            )
        )
    ),
);

if (preg_match('/www\.(site1)\.(?:(ch|fr|it))$/', $_SERVER['HTTP_HOST'])) {

    $GLOBALS['TYPO3_CONF_VARS']['EXTCONF']['realurl']['_DOMAINS'] = array(
        'encode' => array(
            array(
                'GETvar' => 'L',
                'value' => '0',
                'useConfiguration' => $site1De,
                'urlPrepend' => $site1DeWithPrefix,
                'ifDifferentToCurrent' => 'true'
            ),
            array(
                'GETvar' => 'L',
                'value' => '1',
                'useConfiguration' => $site1Fr,
                'urlPrepend' => $site1FrWithPrefix,
                'ifDifferentToCurrent' => 'true'
            ),
            array(
                'GETvar' => 'L',
                'value' => '2',
                'useConfiguration' => $site1It,
                'urlPrepend' => $site1ItWithPrefix,
                'ifDifferentToCurrent' => 'true'
            ),
        ),
        'decode' => array(
            $site1De => array(
                'GETvars' => array(
                    'L' => ''
                ),
                'useConfiguration' => $site1De
            ),
            $site1Fr => array(
                'GETvars' => array(
                    'L' => '1'
                ),
                'useConfiguration' => $site1Fr
            ),
            $site1It => array(
                'GETvars' => array(
                    'L' => '2'
                ),
                'useConfiguration' => $site1It
            ),
        )
    );
} else {
    $GLOBALS['TYPO3_CONF_VARS']['EXTCONF']['realurl']['_DOMAINS'] = array(
        'encode' => array(
            array(
                'GETvar' => 'L',
                'value' => '0',
                'useConfiguration' => $site2De,
                'urlPrepend' => $site2DeWithPrefix,
                'ifDifferentToCurrent' => 'true'
            ),
            array(
                'GETvar' => 'L',
                'value' => '1',
                'useConfiguration' => $site2Fr,
                'urlPrepend' => $site2FrWithPrefix,
                'ifDifferentToCurrent' => 'true'
            ),
            array(
                'GETvar' => 'L',
                'value' => '2',
                'useConfiguration' => $site2It,
                'urlPrepend' => $site2ItWithPrefix,
                'ifDifferentToCurrent' => 'true'
            )
        ),
        'decode' => array(
            $site2De => array(
                'GETvars' => array(
                    'L' => ''
                ),
                'useConfiguration' => $site2De
            ),
            $site2Fr => array(
                'GETvars' => array(
                    'L' => '1'
                ),
                'useConfiguration' => $site2Fr
            ),
            $site2It => array(
                'GETvars' => array(
                    'L' => '2'
                ),
                'useConfiguration' => $site2It
            )
        )
    );
}

$GLOBALS['TYPO3_CONF_VARS']['EXTCONF']['realurl'][$site1Fr] = $GLOBALS['TYPO3_CONF_VARS']['EXTCONF']['realurl'][$site1De];
$GLOBALS['TYPO3_CONF_VARS']['EXTCONF']['realurl'][$site1It] = $GLOBALS['TYPO3_CONF_VARS']['EXTCONF']['realurl'][$site1De];


$GLOBALS['TYPO3_CONF_VARS']['EXTCONF']['realurl'][$site2De] = $GLOBALS['TYPO3_CONF_VARS']['EXTCONF']['realurl'][$site1De];
$GLOBALS['TYPO3_CONF_VARS']['EXTCONF']['realurl'][$site2De]['pagePath']['rootpage_id'] = 6;

$GLOBALS['TYPO3_CONF_VARS']['EXTCONF']['realurl'][$site2Fr] = $GLOBALS['TYPO3_CONF_VARS']['EXTCONF']['realurl'][$site2De];
$GLOBALS['TYPO3_CONF_VARS']['EXTCONF']['realurl'][$site2It] = $GLOBALS['TYPO3_CONF_VARS']['EXTCONF']['realurl'][$site2De];