Add coarse location permission request when using the wifi whitelist from Android 8.1.
Fixed downloading new RSS items when the app is not running.
Update openssl to 1.1.0k.
Add support for 64 bit architectures.
Please note: the coarse location permission is only needed if you want to use the WiFi white list feature from Android 8.0. You will be prompted when it is really needed, you can keep it off otherwise.