Discord status shows unknownmap for custom maps, which don't exist in valid_maps.

[Warfork]

Maps which don't exist in valid_maps https://github.com/TeamForbiddenLLC/warfork-qfusion/blob/master/source/client/cl_discord.c#L181C20-L181C30 properly show unknownmap as the levelshot, but also use that label for the map name, which is incorrect. Please note custom map names will probably need to be truncated in length and\or sanitized.