+ *) Remove lots of duplicated code from the EVP library. For example *every*
+ cipher init() function handles the 'iv' in the same way according to the
+ cipher mode. They also all do nothing if the 'key' parameter is NULL and
+ for CFB and OFB modes they zero ctx->num.
+
+ Most of the routines have the same form and so can be declared in terms
+ of macros.
+
+ By shifting this to the top level EVP_CipherInit() it can be removed from
+ all individual ciphers. If the cipher wants to handle IVs or keys
+ differently it can set the EVP_CIPH_CUSTOM_IV or EVP_CIPH_ALWAYS_CALL_INIT
+ flags.
+ [Steve Henson]
+