Finish multiplayer support #676

Job	Run time
iOS / build (Debug)	1m 43s
Android / build (Debug)	51s
Linux (arm64) / build (Debug)	1m 39s
iOS / build (Release)	1m 32s
Android / build (Release)	39s
Linux (arm64) / build (Release)	2m 20s
iOS / build (RelWithDebInfo)	1m 38s
Android / build (RelWithDebInfo)	36s
Linux (arm64) / build (RelWithDebInfo)	1m 37s
Linux (x86_64) / build (Debug)	3m 49s
Linux (x86_64) / build (Release)	3m 6s
Linux (x86_64) / build (RelWithDebInfo)	3m 11s
macOS (arm64) / build (Debug)	3m 19s
macOS (x86_64) / build (Debug)	4m 54s
macOS (arm64) / build (Release)	2m 31s
tvOS / build (Debug)	1m 43s
macOS (x86_64) / build (Release)	5m 30s
macOS (arm64) / build (RelWithDebInfo)	3m 2s
tvOS / build (Release)	1m 16s
macOS (x86_64) / build (RelWithDebInfo)	5m 40s
tvOS / build (RelWithDebInfo)	1m 16s
Windows (x86_64) / build (Debug)	9m 34s
Windows (x86_64) / build (Release)	8m 23s
Windows (x86_64) / build (RelWithDebInfo)	9m 53s
	1h 19m 42s

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