Establishes an RFC-2003 style IP encapsulation tunnel using a tun(4)
kernel interface combined with divert sockets and IP firewall rules,
implemented in a user-space daemon. No kernel mods are required,
except enabling divert sockets, IPfirewalls, and a number of tun
interfaces.
PR: 17415
Submitted by: Yu-Shun Wang <yushunwa@isi.edu>
