changed Hernan Collazo <hernan_collazo@salutia.com> as spanish translator

AUTHORS

@@ -22,7 +22,7 @@
    Portuguese (Brazil): Henrique Moura <henriquemoura@hotmail.com>
    French        Ali Nedjimi <lrdfrx@club-internet.fr>
    Italian       Aldo Moresco <moresco@idcm.it>
-   Spanish       Robinson Maureira Castillo <folken@anime.cl>
+   Spanish       Hernan Collazo <hernan_collazo@salutia.com>  
    Korean        Jong-II Kim <aporie@netian.com>
 
  Significant Contributions:
@@ -31,5 +31,5 @@
    SquirrelMail logo:   Libor Kopecky <libor@globe.cz>
    Code contributions:  Konstantin Riabitsev <graf@relhum.org>
                         Alex Bleeker <beheer@hackers.nl>
+                        Many others...
 
-   Many others...