spearmint: Rename cl_localClients to cl_localPlayers, breaks VM compat

Q3 start server menu sets cl_localClients. Renaming it breaks existing
CGame VMs. It doesn't literly break them, but bumpped API version anyway.
spearmint: Make it easier to change VM/renderer/gamesettings filenames

Fix checking if reading game qvm and not reference it. It was checking wrong name.