[TYPO3-core] RFC #15891: felogin: Add hook before HTTP redirect

[Xavier Perseguers]

Hi,

> This is an SVN patch request.
>
> Type: feature
>
> Bugtracker reference:
> http://bugs.typo3.org/view.php?id=15891
>
> Branches: trunk
>
> Problem:
> When felogin is configured to redirect the user to some page, no hook is
> available to perform a custom action after a successful login.
>
> Solution:
> Add a hook before the HTTP redirect

Self review :-) Will add a is_array() test around the foreach on 
TYPO3_CONF_VARS before committing. I copied another hook definition of 
this class but the is_array() test should definitively be made.

Xavier