SSL_CTX_clear_options
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);
SSL_CTX_clear_options(ssl_ctx, sht->ssl_clear_options);
SSL_CTX_clear_options(ctx, cfg.clr);