[strongSwan] HA in StrongSwan

[Martin Willi]

Hi Ali,

> and now I think HA is only supported in IKEv2. am I right?

This was true for 4.x, but is not anymore for 5.x. charon now handles
IKEv1, and the HA plugin can handle IKEv1 as well.

It hasn't been tested extensively, though, and there may be some issues
with some scenarios. But feel free to experiment with it and report any
problems.

Regards
Martin