[tz] tz abbreviations / zdump for programmers

[Clive D.W. Feather]

John Haxby said:
> It's not that long ago that someone thought we in the UK were on GMT all year round.

Microsoft still do (or at least seem to think that "GMT" means "UK legal
time").

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Clive D.W. Feather          | If you lie to the compiler,
Email: clive at davros.org     | it will get its revenge.
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