[strongSwan] Default PRF algorithm selection

[Martin Willi]

Hi,

> > Sounds like a regression: how was this supposed to work before the 5.0.2 version?
> 
> It never did.  Apparently, you are the first one to use these algorithms
> (at least without specifying an explicit PRF).

Note that these algorithms are very exotic, and most likely not even
supported by other implementations. I don't see much benefit from
actually using them. They have IANA identifiers, but only because they
are used in a Fiber Channel context, as specified by RFC4595.

Regards
Martin