This pull request lets OpenSSL::Stack default to the symbol OPENSSL_sk_num instead of sk_num.
OpenSSL 1.0.2, which provided the old symbol name, is out of support since December 2019.
The issues #82 and #68 and possibly also #72 report problems with sk_num.
The builds fail. It seems that older OpenSSL versions don't provide version numbers that are greater than 0 but smaller than 0x10100000. I will close this pull request.
This pull request lets OpenSSL::Stack default to the symbol OPENSSL_sk_num instead of sk_num. OpenSSL 1.0.2, which provided the old symbol name, is out of support since December 2019. The issues #82 and #68 and possibly also #72 report problems with sk_num.