[strongSwan] virtual IP request with IPv6 in IPv4 use case

[Martin Willi]

Hi,

>   01[IKE] traffic selectors fec1::/16 === 0.0.0.0/0  inacceptable

Currently the virtual IP address family is determined on the (local)
leftsubnet option. Defining

  leftsubnet=::/0

on the client should fix this scenario.

To have a better fallback if no leftsubnet is given, I've pushed a patch
[1] that looks at the family of rightsubnet if no leftsubnet is given.

Regards
Martin

[1]http://git.strongswan.org/?p=strongswan.git;a=commitdiff;h=e2dd114f