BUG/MINOR: cli: wait for payload data even without prompt

During a payload transfer, we need to wait for the data even when we are
not in interactive mode. Indeed, the data could be received line per
line progressively instead of in one recv.

Previously the CLI was doing a SHUTW just after the first line if it was
not in interactive mode. We now check if we are in payload mode to do
a SHUTW.

Should be backported in 1.8.
diff --git a/src/cli.c b/src/cli.c
index c6d2265..3af5c6a 100644
--- a/src/cli.c
+++ b/src/cli.c
@@ -758,7 +758,8 @@
 			 * buffer is empty. This still allows pipelined requests
 			 * to be sent in non-interactive mode.
 			 */
-			if ((res->flags & (CF_SHUTW|CF_SHUTW_NOW)) || (!(appctx->st1 & APPCTX_CLI_ST1_PROMPT) && !co_data(req))) {
+			if (((res->flags & (CF_SHUTW|CF_SHUTW_NOW))) ||
+			   (!(appctx->st1 & APPCTX_CLI_ST1_PROMPT) && !co_data(req) && (!(appctx->st1 & APPCTX_CLI_ST1_PAYLOAD)))) {
 				appctx->st0 = CLI_ST_END;
 				continue;
 			}