message: [net] Remove unnecessary default args on OpenNetworkConnection
diff: @@ -212,7 +212,7 @@ public:
  bool GetNetworkActive() const { return fNetworkActive; };
  bool GetUseAddrmanOutgoing() const { return m_use_addrman_outgoing; };
  void SetNetworkActive(bool active);
  - void OpenNetworkConnection(const CAddress& addrConnect, bool fCountFailure, CSemaphoreGrant *grantOutbound = nullptr, const char *strDest = nullptr, ConnectionType conn_type = ConnectionType::OUTBOUND_FULL_RELAY);
  + void OpenNetworkConnection(const CAddress& addrConnect, bool fCountFailure, CSemaphoreGrant* grantOutbound, const char* strDest, ConnectionType conn_type);
  bool CheckIncomingNonce(uint64_t nonce);
  bool ForNode(NodeId id, std::function<bool(CNode* pnode)> func);
  