bugfix: packet_dup() not copy metadata

src/packet/packet.cpp

@@ -904,6 +904,8 @@ struct packet *packet_dup(const struct packet *pkt)
     {
         dup_pkt->frag_layer = &dup_pkt->layers[pkt->frag_layer - pkt->layers];
     }
+    memcpy(&dup_pkt->meta, &pkt->meta, sizeof(struct metadata));
+    packet_set_origin_ctx(dup_pkt, (void *)NULL);
 
     return dup_pkt;
 }