porting efforts. Also, add Richard's name to the prior change.
Changes between 0.9.7c and 0.9.8 [xx XXX xxxx]
+ *) bn_dup_expand() has been deprecated, it was introduced in 0.9.7 and
+ remained unused and not that useful. A variety of other little bignum
+ tweaks and fixes have also been made continuing on from the audit (see
+ below).
+ [Geoff Thorpe]
+
*) Constify all or almost all d2i, c2i, s2i and r2i functions, along with
associated ASN1, EVP and SSL functions and old ASN1 macros.
+ [Richard Levitte]
*) BN_zero() only needs to set 'top' and 'neg' to zero for correct results,
and this should never fail. So the return value from the use of