ssl/Basic: use TLS_method() and SSL_CTX_set_min_proto_version()
ssl/Basic: use TLS_method() and SSL_CTX_set_min_proto_version()

SSLv23_method() and `SSL_OP_NO_SSLv2|SSL_OP_NO_SSLv3` are obsolete.

CM4all/beng-proxy,CM4all/beng-proxy,CM4all/beng-proxy,CM4all/beng-proxy,CM4all/beng-proxy,CM4all/beng-proxy