[tz] Update frequency has dropped off(?)

[Paul Eggert]

Paul Holland wrote:
> Does this mean (1) the database has stabilised; or (2) it is no longer actively maintained?

It's still actively maintained; see https://github.com/eggert/tz and/or look at 
the mailing list archive. I don't like to issue new releases "just because", as 
each release is somewhat of a hassle for downstream users. The usual pattern is 
a flurry of changes before March and then again before November. We will need a 
new release well before 2018-01-14, when the current release becomes wrong for 
Fiji. Possibly we'll get last-minute notices in the next two or three months 
that will require new releases promptly.