[strongSwan] host2host-cert using sql

[Tobias Brunner]

Hi Michael,

> Using the tunnel endpoint as both the start_addr & end_addr works.  When 
> I first tried, I had "kind" set to 0 in both rows of 
> child_config_traffic_selector table.  I have no idea what "kind" means 
> (it doesn't show up in [1]) , but the sample sql for net2net-cert had 
> kind=1 in the second child_config_traffic_selector.

`kind` refers to the following:

  0 Local Traffic Selector
  1 Remote Traffic Selector
  2 Local Dynamic Traffic Selector (%dynamic)
  3 Remote Dynamic Traffic Selector (%dynamic)

Defined in sql_config.c of the sql plugin.

Regards,
Tobias