mod_proxy_http2: detect TLS close notify on backend connection, patch by Yann Ylavic

    }

    ctx->p_conn->is_ssl = ctx->is_ssl;

    if (ctx->is_ssl) {

        /* If there is still some data on an existing ssl connection, now

         * would be a good timne to get rid of it. */

        ap_proxy_ssl_connection_cleanup(ctx->p_conn, ctx->rbase);

    if (ctx->is_ssl && ctx->p_conn->connection) {

        /* If there are some metadata on the connection (e.g. TLS alert),

         * let mod_ssl detect them, and create a new connection below.

         */ 

        apr_bucket_brigade *tmp_bb;

        tmp_bb = apr_brigade_create(ctx->rbase->pool, 

                                    ctx->rbase->connection->bucket_alloc);

        status = ap_get_brigade(ctx->p_conn->connection->input_filters, tmp_bb,

                                AP_MODE_SPECULATIVE, APR_NONBLOCK_READ, 1);

        if (status != APR_SUCCESS && !APR_STATUS_IS_EAGAIN(status)) {

            ctx->p_conn->close = 1;

        }

        apr_brigade_cleanup(tmp_bb);

    }   

    /* Step One: Determine the URL to connect to (might be a proxy),