Mark public bn_nist and ec_nist API for removal
The faster nist code is rife with problematic C. While this is generally
considered to be a pleonasm nowadays, here it specifically refers to
aliasing issues and other flavors of undefined behavior. With compilers
and standardization committees becoming seemingly more determined about
making C even more unusable than it already is, this code has resulted
in miscompilations and generally is a target rich environment for fuzzers
to feast on. We're better off without it. Go look while it's still there.
It's some of the very worst we have to offer.
ok jsing