main: Use openconnect_set_pfs() instead of touching vpninfo->pfs
main: Use openconnect_set_pfs() instead of touching vpninfo->pfs

Signed-off-by: Kevin Cernekee <3105dbb3dd63fbb4f6371cfb04adc6726f76c56b@gmail.com>

brandt/openconnect,liiir1985/openconnect,chadcatlett/openconnect,mtmiller/openconnect,atyndall/openconnect,atyndall/openconnect,neshema/openconnect,mtmiller/openconnect,chadcatlett/openconnect,mtmiller/openconnect,matlockx/openconnect,lins05/openconnect,mveplus/openconnect-client,don-johnny/openconnect,brandt/openconnect,matlockx/openconnect,nmav/openconnect-mine,matlockx/openconnect,nmav/openconnect-mine,nmav/openconnect-mine,lins05/openconnect,liiir1985/openconnect,cernekee/openconnect,atyndall/openconnect,cernekee/openconnect,liiir1985/openconnect,mveplus/openconnect-client,lins05/openconnect,matlockx/openconnect,liiir1985/openconnect,don-johnny/openconnect,nmav/openconnect-mine,don-johnny/openconnect,neshema/openconnect,chadcatlett/openconnect,atyndall/openconnect,mveplus/openconnect-client,neshema/openconnect,mveplus/openconnect-client,don-johnny/openconnect,cernekee/openconnect,chadcatlett/openconnect,neshema/openconnect,lins05/openconnect,mtmiller/openconnect,brandt/openconnect,cernekee/openconnect,brandt/openconnect