Since the last commit also included the OCSP nonce change

 Changes between 0.9.7c and 0.9.7d  [xx XXX XXXX]

  *) When creating an OCSP nonce use an OCTET STRING inside the extnValue.

     A clarification of RFC2560 will require the use of OCTET STRINGs and 

     some implementations cannot handle the current raw format. Since OpenSSL

     copies and compares OCSP nonces as opaque blobs without any attempt at

     parsing them this should not create any compatibility issues.

     [Steve Henson]

  *) New md flag EVP_MD_CTX_FLAG_REUSE this allows md_data to be reused when

     calling EVP_MD_CTX_copy_ex() to avoid calling OPENSSL_malloc(). Without

     this HMAC (and other) operations are several times slower than OpenSSL