tayga-0.9.2-bp156.5.3

- 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

- Added hardening to systemd service(s) (bsc#1181400). Modified:
  * tayga.service

- specfile cleanup
- add patch: tayga-obey-cflags.diff (build with proper CFLAGS)

- systemd integration

- Initial version of tayga package