player: update to include kicking from the class

[jtoppins]

Instead of relying on an external script to affect a kick from a given player slot, update the player class to use the newly available net singleton[1] to kick players from given slots.

[1] https://wiki.hoggitworld.com/view/DCS_singleton_net

[ricmzn]

Might want to wait a few more patches for the feature to become stable, as ED already accidentally removed the net singleton once, having to put it back into a hotfix...

[jtoppins]

Ok thanks for the info.