Log Message:
Update TYPO3 package to 4.2.3.

Initially it was simply bug fix release and please refer the URL for
full changes: http://wiki.typo3.org/TYPO3_4.2.3.

And now, it found out that two Cross Site Scripting (XSS) problem was
fixed by this release.

Regarding the issue in backend module "file": TYPO3 Security Bulletin
TYPO3-20081113-1: Cross-Site Scripting vulnerability in TYPO3 Core

<http://typo3.org/teams/security/security-bulletins/typo3-20081113-1/>

Regarding the issue in system extension "felogin": TYPO3 Security
Bulletin TYPO3-20081113-2: Cross-Site Scripting vulnerability in TYPO3 Core

<http://typo3.org/teams/security/security-bulletins/typo3-20081113-2/>