TYPO3 Core

Problem:
Currently the standard CSS_Styled_Content login form, tt_content.login.20 is using the old mapping. This should be changed, so it uses the new mapping.

One of the problems with using the new mapping is the prefix is always used in the field names. It should be configurable to turn the prefix off. In the core the login logic is done in the class 't3lib_userAuth'.

Also check how the form handles the situation when somebody is already logged in. It might be we need a preprocessor for this, so the whole form will be skipped when the user is logged in.