Disconnect and close a Match - UNET Unity3d 5.2

Hallo everyone,

im wrote the following Script and it works fine. But I have some Questions:

1. But now i´m trying to close a match after it is opend from the host. How can I close or destroy it?
2. How can I disconnect a Client?
3. If i create a Match an leave it, i have to quit & restart the whole game, because the Network isn´t working anymore. Is there a possibilty to restart the NetworkManager?

I´m using the Networkmanagert in Editor and the following selfmade...

Disconnect and close a Match - UNET Unity3d 5.2