ipsec: pfs ecc brainpool curve support
ipsec: pfs ecc brainpool curve support

Use brainpool curves as perfect forward security.

Signed-off-by: Bruno Thomsen <aea5195c0d593b733bbc532a3448f6e7d3519002@gmail.com>

jxmx/pfsense,BlackstarGroup/pfsense,ptorsten/pfsense,pfsense/pfsense,brunostein/pfsense,NewEraCracker/pfsense,ch1c4um/pfsense,brunostein/pfsense,dennypage/pfsense,jxmx/pfsense,BlackstarGroup/pfsense,ch1c4um/pfsense,dennypage/pfsense,NewEraCracker/pfsense,phil-davis/pfsense,jxmx/pfsense,NewEraCracker/pfsense,BlackstarGroup/pfsense,phil-davis/pfsense,NOYB/pfsense,ch1c4um/pfsense,BlackstarGroup/pfsense,pfsense/pfsense,ptorsten/pfsense,dennypage/pfsense,NOYB/pfsense,NOYB/pfsense,ptorsten/pfsense,phil-davis/pfsense,dennypage/pfsense,pfsense/pfsense,phil-davis/pfsense,NewEraCracker/pfsense,brunostein/pfsense,pfsense/pfsense,ch1c4um/pfsense