TYPO3 Core

The Logoutform ist invalid by w3c specification. There're ampersands in the code. The Form-Tags looks like this:
<form action="page.html?&page=" target="_top" method="post">

To get xHTML validation it must be:

<form action="page.html?&_amp;page=" target="_top" method="post">

(without underscore) so & must be &_amp;

I've located the problem in typo3/sysext/felogin/pi1/class.tx_felogin_pi1.php nearly line 569 and line 575.

Please fix this bug in one of the next versions of TYPO3, so I don't have to fix it by myself at every new update.

(issue imported from #M10663)