[strongSwan] addrblock plugin

[Tobias Brunner]

Hi Noel,

> I just looked at the addrblock plugin in the plugin list and found that there was no information
> whatsoever about how it works. Does anyone use this plugin and if so, might he/she share information about how it works?

It verifies RFC 3779 IPAddrBlocks X.509 extensions in certificates and
allows checking them against proposed traffic selectors.

Regards,
Tobias