- now understands 64bit time_t and 64bit data in timezone files.
- localtime(), gmtime(), asctime() and ctime() may now fail with
a NULL result if time_t cannot be represented by struct tm.
On the other hand, it makes it easier to track the master tzcode sources
if we try to keep the distribution together as much as possible.
The zic and zdump commands will access the files the need with make's
.PATH facility.
