* Pass full match data to InstanceLauncher instead of only match type
* Track server threads by match ID rather than thread instance ID
* Update child completion handling to use match ID
* Launch game servers in headless mode
* Add configurable game address and port to GameData
* Pass dynamically assigned server ports to clients
* Update lobby defaults for `0.0.0.0:8080`
* Refactor server command-line argument handling
