Sync "language", "lang_name", "territory", "country_name" with CLDR/langtable

Sync these values with CLDR and langtable as much as possible.  Add
missing values.

If possible, take the values from CLDR, if CLDR does not have it,
take it from langtable. The values from langtable which are not from
CLDR are from  Wikipedia or native speakers.