deviates from the "standard" 64 bits of feedback that all other
algorithms are using. Therefore, let's redo certain EVP macros to
accept different amounts of feedback bits for these modes.
Also, change e_aes.c to provide all usually available modes for AES.
CTR isn't included yet.
sure they are available in opensslconf.h, by giving them names starting
with "OPENSSL_" to avoid conflicts with other packages and by making
sure e_os2.h will cover all platform-specific cases together with
opensslconf.h.
I've checked fairly well that nothing breaks with this (apart from
external software that will adapt if they have used something like
NO_KRB5), but I can't guarantee it completely, so a review of this
change would be a good thing.
Declare ciphers in terms of macros. This reduces
the amount of code and places each block cipher EVP
definition in a single file instead of being spread
over 4 files.
