[strongSwan] Test scenario's for Mac OSX app

[Tobias Brunner]

Hi Nicolas,

> My problem is that on the Mac app client I get the error:
> 
> ```
> constraint check failed: identity ’[server ip]' required
> ```

I've added this to the FAQs [1].

Regards,
Tobias

[1]
https://wiki.strongswan.org/projects/strongswan/wiki/FAQ#constraint-check-failed-identity-required