Reviewed-by: Richard Levitte <levitte@openssl.org> (Merged from https://github.com/openssl/openssl/pull/5689)
When SSL_CTX is created preinitialize it with system default configuration from system_default section. Reviewed-by: Tim Hudson <tjh@openssl.org> Reviewed-by: Rich Salz <rsalz@openssl.org> (Merged from https://github.com/openssl/openssl/pull/4848)