BUG/MINOR: acme/cli: fix argument check and error in 'acme challenge_ready'

Fix the check or arguments of the 'acme challenge_ready' command which
was checking if all arguments are NULL instead of one of the argument.

Must be backported to 3.2 and later.

(cherry picked from commit 8e250bb)
Signed-off-by: Christopher Faulet <cfaulet@haproxy.com>
(cherry picked from commit ac2886a)
Signed-off-by: Christopher Faulet <cfaulet@haproxy.com>

Author: wlallemand

src/acme.c

@@ -2768,8 +2768,8 @@ static int cli_acme_chall_ready_parse(char **args, char *payload, struct appctx
 	int remain = 0;
 	struct ebmb_node *node = NULL;
 
-	if (!*args[2] && !*args[3] && !*args[4]) {
-		memprintf(&msg, ": not enough parameters\n");
+	if (!*args[2] || !*args[3] || !*args[4]) {
+		memprintf(&msg, "Not enough parameters: \"acme challenge_ready <certfile> domain <domain>\"\n");
 		goto err;
 	}