Revert Revision 66556: Require saltedpasswords to be installed

git-svn-id: https://svn.typo3.org/TYPO3v4/Extensions/sr_feuser_register/trunk@76767 735d13b6-9817-0410-8766-e36946ffe9aa
Revert Revision 66559: Require felogin, rsaauth and saltedpasswords

git-svn-id: https://svn.typo3.org/TYPO3v4/Extensions/sr_feuser_register/trunk@76769 735d13b6-9817-0410-8766-e36946ffe9aa
Revert Revision 66567: Always check for required rsaauth

git-svn-id: https://svn.typo3.org/TYPO3v4/Extensions/sr_feuser_register/trunk@76770 735d13b6-9817-0410-8766-e36946ffe9aa