Updated Finnish translation by Sini Ruohomaa and Markus Linnakangas
These are just msgmerged copies from S2_4

freeciv domain:
5196 translated messages, 728 fuzzy translations, 490 untranslated messages.

nations domain:
1308 translated messages, 228 fuzzy translations, 310 untranslated messages.


git-svn-id: svn://svn.gna.org/svn/freeciv/trunk@25231 a0f10bec-cc02-0410-94fc-a9cfff90b4cd