rsaauth with more than one login form on one page doesn't work
If you have more than one login form on one page only the last rendered login form will work. This happens because when the second login form is rendered the created private key overwrites the first form's private key. This problem is also described on forge: http://forge.typo3.org/issues/6708
In my patch the class tx_rsaauth_keypair is a singleton so that it will be used only one time. The patch also changes the backend classes to check if the class tx_rsaauth_keypair was already called. And it adds some error handling.
The patch is created against TRUNK revision 10349.
(issue imported from #M17388)