Update to 1.69
    
    - New upstream release 1.69
      - Testing with OpenSSL 1.0.2, 1.0.2a OK
      - Completed LibreSSL compatibility
      - Improved compatibility with OpenSSL 1.0.2a
      - Added the X509_check_* functions introduced in OpenSSL 1.0.2
      - Added support for X509_V_FLAG_TRUSTED_FIRST constant
      - Allow get_keyblock_size to work correctly with OpenSSL 1.0.1 onwards