docs: Update networkedvar.md (Unity-Technologies#356)

Merge pull request Unity-Technologies#371 from LukeStampfli/feature/f…

…ix-networkconfig

fix: NetworkConfig exclude registered scenes list from hash if scene managment is disabled

fix: Fixed serialization problem in last versions binary

fix: Fix null UnityEngine.Object serialization

fix: Scene objects destroyed on server will now be destroyed on client

perf: Fixed CustomMessage send scaling from O(n) to O(1) for n clients

Merge pull request Unity-Technologies#357 from MidLevel/client-rpc-bulk

perf: Improve RPC bulking and delegate alloc fix

feat: Added None loglevel to disable logging

feat: Added NetworkLog

BREAKING CHANGE: Removes the old LogHelper

fix: Fixed NetworkedTransform not working for non host servers

Fixes: Unity-Technologies#329