message: Allow GMs to enter private instances
diff: @@ -371,12 +371,25 @@ void instanceCommand(std::string full, std::vector<std::string>& args, CNSocket*
  // move player to specified instance
  // validate instance ID
  char* instanceS;
  - int instance = std::strtol(args[1].c_str(), &instanceS, 10);
  + uint64_t instance = std::strtoll(args[1].c_str(), &instanceS, 10);
  if (*instanceS) {
  ChatManager::sendServerMessage(sock, "[INST] Invalid instance ID: " + args[1]);
  return;
  }
  + if (args.size() >= 3) {
  + char* playeridS;
  + uint64_t playerid = std::strtoll(args[2].c_str(), &playeridS, 10);
  +
  + if (playerid != 0) {
  + instance |= playerid << 32ULL;
  + ChunkManager::createInstance(instance);
  +
  + // a precaution
  + plr->recallInstance = 0;
  + }
  + }
  +
  PlayerManager::sendPlayerTo(sock, plr->x, plr->y, plr->z, instance);
  ChatManager::sendServerMessage(sock, "[INST] Switched to instance with ID " + std::to_string(instance));
  }
  