[tz] Estimate for a new tzdb release with Brazil rules.

[Paul Eggert]

On 5/15/19 12:25 PM, Chris Woodbury via tz wrote:
> Perhaps one might check if "git" was installed.

I'm sure Robert could do that, but I assume he doesn't want to bother. I
don't know which version-control system he used (if any) when he
maintained tzdata (2011l through 2012c). Arthur David Olson used SCCS
before that.

tzdb has always been distributed as a tarball that requires only
standard POSIX utilities like 'make', 'awk' and a C compiler to build,
and there are no plans to change this. However, maintainers can be
expected to have a better set of development tools than what POSIX
requires. Nowadays a good repository system is invaluable for any
nontrivial software project, and I didn't have any qualms about using
Git for current maintenance, as it's by far the most-popular such system
and it's free. If you don't want to use Git that's fine; we'll take
plain POSIX 'diff -u' patches instead.