[tz] [Patch] Make it slightly easier to parse tzdata

[Paul Eggert]

Lester Caine wrote:
> I have my own
> reasons for wanting to maintain the existing tz rules after
> transmission, but is this another one dictating that a proper
> transparent transmission format is a requirement earlier rather than later?

It appears to be further support for that sort of thing, yes.  This is basically 
a tzdist issue, not a tz issue, right?  Unless the idea is that tz also start 
distributing binaries?