• Expose SSL_get_ciphers. Thanks to github user dylc5190.
  
• Expose SSL_CIPHER_get_version and fix SSL_CIPHER_description
  and SSL_CIPHER_get_bits. Also fixed and enhanced
  documentation for these and related SSL_CIPHER functions.
  
• Clarify libssl version support policy: all stable versions of OpenSSL in
  the 0.9.8 - 1.1.1 branches (with the exception of 0.9.8 - 0.9.8b) and all
  stable releases of LibreSSL in the 2.0 - 3.1 series are supported.
  
• Direct bug reports to the GitHub repository, since rt.cpan.org will shut
  down on 2021-03-01.