Changes between 0.9.6 and 0.9.7 [xx XXX 2000]
+ *) Implement binary inversion algorithm for BN_mod_inverse in addition
+ to the algorithm using long divison. The binary algorithm can be
+ used only if the modulus is odd. It is faster only for relatively
+ small moduli (roughly 20% for 128-bit moduli, roughly 5% for 256-bit
+ moduli), so we use it only for moduli up to 400 bits.
+ [Bodo Moeller]
+
*) Change bctest again: '-x' expressions are not available in all
versions of 'test'.
[Bodo Moeller]