Method unregister_client

src/mgr/PyModuleRegistry.h:220–230

    clients.emplace(n, std::move(addrs));
  }
  void unregister_client(std::string_view name, const entity_addrvec_t& addrs)
  {
    std::lock_guard l(lock);
    auto itp = clients.equal_range(std::string(name));
    for (auto it = itp.first; it != itp.second; ++it) {
      if (it->second == addrs) {
        clients.erase(it);
        return;
      }
    }
  }

  auto get_clients() const
  {