* 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 language

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

* Better date parsing (sig)

