engine: client: fix joining current protocol servers #2328

Job	Run time
flatpak (su.xash.Engine.Compat.i386)	4m 16s
build (ubuntu-20.04, linux, amd64)	3m 19s
build (ubuntu-20.04, linux, i386)	2m 18s
build (ubuntu-20.04, android, multiarch)	4m 55s
build (ubuntu-latest, nswitch, arm64)	3m 19s
build (ubuntu-latest, psvita, armv7hf)	2m 15s
build (windows-latest, win32, amd64)	52s
build (windows-2019, win32, i386)	1m 39s
build (macos-14, apple, arm64)	1m 20s
build (macos-12, apple, amd64)	1m 51s
Upload releases	45s
	26m 49s

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