nameserver: do not solve answer if it was already solved

src/knot/nameserver/internet.c

@@ -418,6 +418,11 @@ static int solve_name(int state, knot_pkt_t *pkt, knotd_qdata_t *qdata)
 
 static int solve_answer(int state, knot_pkt_t *pkt, knotd_qdata_t *qdata, void *ctx)
 {
+	/* Do not solve if already solved, e.g. in a module. */
+	if (state == KNOTD_IN_STATE_HIT) {
+		return state;
+	}
+
 	/* Get answer to QNAME. */
 	state = solve_name(state, pkt, qdata);