The current Unet system is going to be replaced by a new system at the end of 2019.
Info about the new system and implementing timeline can be found here :
UnityBlog
A (Dedicated)Server and Client setup in one Build.
Using Unity 5 UNET and the new UI system.
Run one Instance as a Server on any PC any where.
Run others as a Client to connect to the server via IP address.
With optional server password protection and IP lookup tool.
Contains a custom NetworkManager a Server ManagerHUD and a Client ManagerHUD.
They work the same as the standard Network components but with a new UI and only what you need to start a Server and connect a Client to a server (no matchmaking).
Examples of [ClientRpc], [Command] and [SyncVar] included.
