Add com_standalone cvar for at-runtime handling of mods that do not require the original quake3 game data.

code/qcommon/qcommon.h

@@ -681,6 +681,7 @@ void FS_HomeRemove( const char *homePath );
 
 void	FS_FilenameCompletion( const char *dir, const char *ext,
 		qboolean stripExt, void(*callback)(const char *s) );
+
 /*
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