confirm that it is valid.
EC_KEY_set_public_key_affine_coordinates() sets the public key for I<key> based
-on its affine co-ordinates; i.e., it constructs an EC_POINT object based on
+on its affine coordinates; i.e., it constructs an EC_POINT object based on
the supplied I<x> and I<y> values and sets the public key to be this
EC_POINT. It also performs certain sanity checks on the key to confirm
that it is valid.