Recommended update for tayga
This update for tayga fixes the following issues:
- Add tayga_destroy_tun to delete the tunnel interface when the
service is stopped
- Drop PrivateDevices and ProtectClock hardening options to repair
startup failure while accessing /dev/net/tun
- Add conditional to tayga_setup_tun to facilitate operation on
systems without iptables
- Submitted by Georg Pfuetzenreuter (crameleon)