cron jobs to fetch and save api data

[uttpal]

Cron jobs to move current data to history and fetch data from freifunk api and update db.

[extua]

Rust crate for interfacing with MySQL (and, maybe, mariadb?)

https://github.com/blackbeam/rust-mysql-simple

[extua]

useful wget command for systematically downloading all the json files

wget -A json -m -p -E -k -K -np https://api.freifunk.net/data/history/