DST law changes in northern Cyprus (new zone Asia/Famagusta), Russia (new
zone Europe/Saratov), Tonga, Antarctica/Casey.  Historical corrections for
Asia/Aqtau, Asia/Atyrau, Asia/Gaza, Asia/Hebron, Italy, Malta.  Replace
invented zone abbreviation "TOT" for Tonga with numeric UTC offset; but
as in the past, we'll keep accepting "TOT" for input.