[tz] Regarding Asia/Calcutta

[Garrett Wollman]

<<On Thu, 16 Jan 2014 08:03:16 -0800, Paul Eggert <eggert at cs.ucla.edu> said:

> Peddi, Radhika (Radhika) wrote:
>> I would like to know whether you have removed Asia/Calcutta time zone from tz database?

> It's an alias for Asia/Kolkata, and it still works.

Unless, of course, you compile the database without the "backward"
file.

It would be nice if there were gradations of "backward".  People might
want to have links for cities that have changed names without also
getting all the obsolete (pre-Great-Renaming) cruft as well.

-GAWollman