amendment on country codes

[Clytie Siddall]

Sorry, just noticed that some of the countries do have both two- and 
three-letter codes in the ISO-3166 files. Quite a few only have 
three-letter codes, but with luck I can match up the two-letter ones 
with the fields in the Installer. :)

from Clytie (vi-VN, team/nhÃm Gnome-vi)
Clytie Siddall--Renmark, in the Riverland of South Australia
á thÃnh phá Renmark, tái mián sÃng cáa Nam Ãc