FTBFS with extra-x86_64-build
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# Description:
<!-- Describe the bug in full detail. -->
I'm not sure if this is worth reporting. But per to [upstream](https://github.com/osm-search/Nominatim/issues/2929#issuecomment-1368513962), curl is banned for `https://nominatim.org/data/country_grid.sql.gz`, resulting in `extra-x86_64-build` failed to download sources.
The only way is to download it before building with `curl -A`.
Should we store it in out repo with a URL in comment, or just leave it as is?
# Additional info:
* package version(s): 4.3.2-1
# Steps to reproduce:
<!-- Describe how to reproduce the bug step by step including the commands -->
1. `extra-x86_64-build`
or
1. `curl -v https://nominatim.org/data/country_grid.sql.gz`
issue