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Avoid non-portable == for the test command
The test command doesn't accept `==` as operator. It should be a single `=` for portable use. The `==` is a gnu extension.
Note that the x-trick hasn't been needed for a long, long time. You can reliably write it with quotes:
```
if test "$gtk3" = yes; then
```
but I left that alone since it doesn't hurt other than being ugly.
| author | Rhialto The M <Rhialto@users.noreply.github.com> |
|---|---|
| date | Sat, 06 Oct 2018 18:26:43 +0200 |
| parents | 8bab8ac8ade0 |
| children |
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The detection of timezone is performed by [ZoneDetect](https://github.com/BertoldVdb/ZoneDetect) timezone16.bin has a longitude resolution of 0.0055 degrees (~0.5km). timezone21.bin has a longitude resolution of 0.00017 degrees (~20m). The safe zone result indicates how close you are to the nearest border (flat earth model using lat and lon as x and y), so you can know when to do a new lookup. If you don't need it you can ignore it, in this case you can pass a NULL parameter to save the (very small) calculation effort. Note that the [underlying database](https://github.com/evansiroky/timezone-boundary-builder) will change from time-to-time.