- Fix a problem that the xrdp.service fail to auto-start when instructed to listen on a specific interface
- By changing the "network.target" systemd dependency to "network-online.target"
- The "network-online.target", in short, means at least one network interface has finished IP level setup.
- The previously used "network.target" is vague and does not provide such guarantee (ref: man systemd.special(7)).
- Which often cause "xrdp.service" fail to auto-start when the service is configured to listen on a specific interface (e.g. in xrdp.ini, "port=tcp://192.168.0.1:3389"). Because the interface may have not finish setting up its IP, when "xrdp.service" starts.