BUG/MEDIUM: listeners: Use the right parameters for strlcpy2().

When calls to strcpy() were replaced with calls to strlcpy2(), one of them
was replaced wrong, and the source and size were inverted. Correct that.

This should fix issue #2110.
diff --git a/src/proto_tcp.c b/src/proto_tcp.c
index 30c2e11..4691e16 100644
--- a/src/proto_tcp.c
+++ b/src/proto_tcp.c
@@ -709,7 +709,7 @@
 	if (listener->bind_conf->options & BC_O_DEF_ACCEPT) {
 		struct accept_filter_arg accept;
 		memset(&accept, 0, sizeof(accept));
-		strlcpy2(accept.af_name, sizeof(accept.af_name), "dataready");
+		strlcpy2(accept.af_name, "dataready", sizeof(accept.af_name));
 		if (setsockopt(fd, SOL_SOCKET, SO_ACCEPTFILTER, &accept, sizeof(accept)) == -1) {
 			chunk_appendf(msg, "%scannot enable ACCEPT_FILTER", msg->data ? ", " : "");
 			err |= ERR_WARN;