[Swan-dev] added sha 2 cryptoapi support with klips

[Wolfgang Nothdurft]

Since Samsung set sha2 as default for their mobile devices, I was forced 
to accomplish this issue with klips.

And fortunately I found the small problems I overlooked last year to 
finish it. :)

Samsung Galaxy S5 uses sha2_256 for xauth
Samsung Galaxy S6 for both xauth and l2tp

I updated the Ticket and added the new patch:

https://bugs.libreswan.org/show_bug.cgi?id=210

Wolfgang