lib/resolve: forward +cd in stub mode; minor bugfix in debug output

lib/resolve.c

@@ -560,8 +560,12 @@ static int query_finalize(struct kr_request *request, struct kr_query *qry, knot
 			/* Stub resolution (ask for +rd and +do) */
 			if (qry->flags & QUERY_STUB) {
 				knot_wire_set_rd(pkt->wire);
-				if (knot_pkt_has_dnssec(request->answer))
+				if (knot_pkt_has_dnssec(request->answer)) {
 					knot_edns_set_do(pkt->opt_rr);
+				}
+				if (knot_wire_get_cd(request->answer->wire)) {
+					knot_wire_set_cd(pkt->wire);
+				}
 			/* Full resolution (ask for +cd and +do) */
 			} else if (qry->flags & QUERY_DNSSEC_WANT) {
 				knot_edns_set_do(pkt->opt_rr);

lib/utils.c

@@ -582,8 +582,8 @@ static void flags_to_str(char *dst, const knot_pkt_t *pkt, size_t maxlen)
 		{knot_wire_get_rd, "rd"},
 		{knot_wire_get_ra, "ra"},
 		{knot_wire_get_tc, "tc"},
-		{knot_wire_get_cd, "cd"},
-		{knot_wire_get_ad, "ad"}
+		{knot_wire_get_ad, "ad"},
+		{knot_wire_get_cd, "cd"}
 	};
 	for (int i = 0; i < 7; ++i) {
 		if (!flag[i].get(pkt->wire)) {
@@ -595,7 +595,7 @@ static void flags_to_str(char *dst, const knot_pkt_t *pkt, size_t maxlen)
 			return;
 		}
 		offset += ret;
-		maxlen -= offset;
+		maxlen -= ret;
 	}
 	dst[offset] = 0;
 }