- `OPENVPN_IPV6` removed
- Affects OpenVPN
- Use the same mechanism for OpenVPN and Wireguard
- Check only once at program start since this is unlikely to change at runtime
- Log if IPv6 is supported
- Remove `IPv6` boolean from settings structs
- Move IPv6 detection as a method on NetLinker
- Extract base64 data from PEM files and secret files
- Environment variables are not PEM encoded and only the base64 data
- Affects OpenVPN certificate, key and encrypted key
* Fragment was defined in `OpenVPNProviderSettings` but was not written to the OpenVPN configuration file.
* Added two additional ciphers to the configuration for ExpressVPN
Authored-by: barino86 <barino@mac.com>