[Bodo Moeller, Lutz Jaenicke]
*) Rationalise EVP so it can be extended: don't include a union of
- cipher/digest structures, add init/cleanup functions. This also reduces
- the number of header dependencies.
+ cipher/digest structures, add init/cleanup functions for EVP_MD_CTX
+ (similar to those existing for EVP_CIPHER_CTX).
Usage example:
EVP_MD_CTX md;