ipvsadm: allow tunneling with gue encapsulation

Added the following options with adding and editing destinations for
tunneling servers:
--tun-type
--tun-port
--tun-nocsum
--tun-csum
--tun-remcsum

Added the following options with listing services for tunneling servers:
--tun-info

Signed-off-by: Jacky Hu <hengqing.hu@gmail.com>
Acked-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
4 files changed