SSL: fix compilation error: 'SSL_OP_MSIE_SSLV2_RSA_PADDING' undeclared 

This option had no effect since 0.9.7h / 0.9.8b and it was removed
in recent OpenSSL.

This patch comes from http://hg.nginx.org/nginx/rev/a73678f5f96f.

This patch tries to fix https://github.com/alibaba/tengine/issues/458.