[Openswan Users] Getting a handle on ip xfrm

[Whit Blauvelt]

Just to make understanding "ip xfrm" more fun, there's nothing more than the
raw syntax on the iproute2 man page for it (as compared to other commands,
which get some explanation), and there's damn little discussion of it on the
web at all. Even lartc.org (Linux Advanced Routing & Traffic Control -
pretty much the standard reference) has no mention of "xfrm" at all. 

Ah, joy. So here we have barely documented use of a nearly undocumented
feature. 

Whit