[tz] NetBSD vs Darwin timezone API

[Paul Eggert]

On 11/10/2016 02:56 PM, Christos Zoulas wrote:
> If you like this and decide on the name, I can provide a sample implementation.

Yes, that sounds good. I suggest the a more-generic name like 
'tzallocate', which would work better if later we add more flags such as 
leap-second handling. E.g., 'timezone_t tzallocate(char const *name, int 
flags);'. tzalloc(NAME) could be equivalent to tzallocate(NAME, 0).