[ruby/openssl] ossl.c: use OPENSSL_init_ssl() and OpenSSL_version() with LibreSSL
LibreSSL 2.7.0 added support for OPENSSL_init_ssl() and OpenSSL_version().
https://github.com/ruby/openssl/commit/1328415097
[ruby/openssl] ossl.c: use OPENSSL_init_ssl() and OpenSSL_version() with LibreSSL
LibreSSL 2.7.0 added support for OPENSSL_init_ssl() and
OpenSSL_version().
https://github.com/ruby/openssl/commit/1328415097