I mistype environment every time, let us use env_t instead

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@6731 8aca7d54-2c30-db11-9de9-000461428c89
complete umgebung and einstellungen translations

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@6732 8aca7d54-2c30-db11-9de9-000461428c89