[tz] America/Indiana/Vincennes

[Matt Johnson]

In zone.tab, the America/Indiana/Vincennes comments were changed to "Eastern - IN (Da, Du, K, Mn)".  IMHO, those abbreviations aren't distinct enough to identify specific counties in Indiana.

We used to say "Daviess, Dubois, Knox & Martin".  Da and Du I might be able to figure out, but K could just as well be Kosciusko County, and Mn could be Madison or Marion.

Can we just return them to their names please?