add binding for openssl `X509_REQ_digest`
add binding for openssl `X509_REQ_digest`

bwhmather/cryptography,Ayrx/cryptography,bwhmather/cryptography,bwhmather/cryptography,kimvais/cryptography,sholsapp/cryptography,Hasimir/cryptography,kimvais/cryptography,skeuomorf/cryptography,Ayrx/cryptography,sholsapp/cryptography,bwhmather/cryptography,sholsapp/cryptography,Hasimir/cryptography,skeuomorf/cryptography,Ayrx/cryptography,sholsapp/cryptography,skeuomorf/cryptography,kimvais/cryptography,kimvais/cryptography,skeuomorf/cryptography,Ayrx/cryptography,Hasimir/cryptography,Hasimir/cryptography