* Enable other ways to specify exceptions

  It should be posible to specify exceptions to the general
configuration using groups, netgroups, even regexps :-) 

* Let users choose the preferred languaje

  Users should be able to select the languaje in which they
would like to receive the reports. Perhaps with a ~/.barrendero 
they could select a languaje or the order of preferred languajes.
If that languaje/s is/are not yet implemented, there should be a 
fallback mechanism till the default languaje.

* Better date parsing (sig)

