SSL_CTX_clear_options
SSL_CTX_clear_options(ctx, s_client_config.clr);
SSL_CTX_clear_options(ssl_ctx, SSL_OP_NO_TLSv1);
SSL_CTX_clear_options(ssl_ctx, SSL_OP_NO_TLSv1_1);
SSL_CTX_clear_options(ssl_ctx, SSL_OP_NO_TLSv1_2);
SSL_CTX_clear_options(ssl_ctx, SSL_OP_NO_TLSv1_3);
SSL_CTX_clear_options(*ssl_ctx, SSL_OP_NO_TICKET);