Missing and faulty declarations for EVP_MD_CTX_new() and EVP_MD_CTX_create()

[cschlote]

In evp.d:554: The following must be added or changed to get things working:

EVP_MD_CTX* EVP_MD_CTX_new();
EVP_MD_CTX* EVP_MD_CTX_create() { return EVP_MD_CTX_new(); };

[kubo39]

#38 would partially fix, but is sitll missing EVP_MD_CTX_create.