(security/R-openssl) Updated 1.4.3 to 2.0.0

2.0.0
- The default fingerprint() for keys has changed from md5 to sha256. This is
  a breaking change, but in line with other software phasing out md5, and needed
  to support systems where use of MD5 has been disabled to comply with FIPS.
- Make the test-suite pass under FIPS on RHEL 8.
- New family of ssl_ctx functions to manipulate an SSL context from inside curl
  https requests.
- Rd manuals have been markdownified

1.4.6
- Update unit tests to new pki.goog test servers

1.4.5
- Tweaks and fixes for upcoming OpenSSLv3. Once OpenSSLv3 is released we should
  port the deprecated functions, but for now we keep supporting OpenSSL 1.0.2.

1.4.4
- Fix rand_bytes for large input
- Remove some legacy Windows workarounds from R 3.2
- Windows: upgrade libs to openssl 1.1.1k

(mef)