[xmlsec] nss updates

[Aleksey Sanin]

>Yes I do.  Fixing this problem is next on the agenda :).
>  
>
Great! Everything else looks really great! All other failing tests are 
expected
to fail as you described in README (ripemd160, certs lookup, rsa-oaep, 
etc.).
BTW, great write up! This really helps to understand how everything is done
in xmlsec-nss.

I think we can try to merge your changes to the trunk next. Almost 
everything
seems to be ready :)

Aleksey