Add a database parameter in feed2exec.ini
Currently, we can create a specific database for a feed by executing the feed2exec command line with the --database flag. However, this means we have to call feed2exec multiple times if we have multiple feeds in the feed2exec.ini that all use their own database. A more convenient solution would be to add the ability to specify a database directly in feed2exec.ini and only call feed2exec fetch
once in a cron job or systemd timer.