[tz] Ambiguous abbreviations for Australian timezones when daylight savings is in affect [SEC=UNCLASSIFIED]

[David Patte ₯]

A group of us from the list have decided to put together a proposed 
patch to change the Australian abbreviations to S/D abbreviations. We 
are hoping, that the maintainers of tz decide to implement the patch in 
the tz database.

In the mean time:
- would the preference be to preceed the abbreviations with A, or not?
- historically, how far back should we apply the patch to the abbreviations.

We will submit the patch to the list for review, and hope it is 
implemented. But if it is not, we have decided to fork tz and provide a 
new distribution with the new abbreviations applied.

David Patte
Relative Data, Inc.