OpenDirs
static OpenDirs openDirs; /* all cached directories */
static void OpenDirs_Remove(OpenDirs *, const char *);
OpenDirs_Init(OpenDirs *odirs)
OpenDirs_Done(OpenDirs *odirs)
OpenDirs_Find(OpenDirs *odirs, const char *name)
OpenDirs_Add(OpenDirs *odirs, CachedDir *cdir)
OpenDirs_Remove(OpenDirs *odirs, const char *name)