Simplify handling of project directory for Nominatim library #3525
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This allows library users, when initialising a
Nominatim[Async]API
object, to hand in a simple string with the filename (instead of aPath
object) or simply leave out the project directory completely.Most of the files stored in the project directory are not really necessary at query time. So running the library without a project directory is entirely reasonable. Pretty much all the unit tests run in project-dir-less mode. You can still change settings like the database DSN through environment variables.