Document Nominatim and OpenStreetMap as Geocoder providers

Thanks for creating this issue @W01F, I also ran into the same challenge, and found a solution, which I'll add shortly.

thanks for this @ressa ... I am going to review this asap ;-)

Thanks @itamair, don't forget to change status :)

Right you are @ressa, as (almost) always 🙂

Remember also to give credit.

well I think I did as I checked both of you just before triggering the Merge command, and your usernames appear (as by) in the commits messages, and your one as author of the commits (both on the 3.x and 4.x branches)
I don't know what I should do more than that ...

I am so sorry, everything is fine, I missed the message at the bottom.

Automatically closed - issue fixed for 2 weeks with no activity.

Sorry I've been tied up, but I'm looking forward to reviewing the latest release with these changes in. Thank you both much!