SSH_BUG_CURVE25519PAD
if ((ssh->compat & (SSH_BUG_CURVE25519PAD|SSH_OLD_DHGEX)) == 0)
if ((ssh->compat & SSH_BUG_CURVE25519PAD) != 0)
"OpenSSH_6.6*", SSH_NEW_OPENSSH|SSH_BUG_CURVE25519PAD|
{ KEXALGOS, DHGEX256","DHGEX1, SSH_BUG_CURVE25519PAD },
{ "a,"KEXALGOS, "a", SSH_BUG_CURVE25519PAD|SSH_OLD_DHGEX },