BN_MONT_CTX_free() frees the components of the B<BN_MONT_CTX>, and, if
it was created by BN_MONT_CTX_new(), also the structure itself.
-BN_mod_mul_mont() computes Mont(B<a>,B<b>):=B<a>*B<b>*R^-1 and places
+BN_mod_mul_montgomery() computes Mont(B<a>,B<b>):=B<a>*B<b>*R^-1 and places
the result in B<r>.
BN_from_montgomery() performs the Montgomery reduction B<r> = B<a>*R^-1.