prep_walk_cache   511 server/request.c     cache = prep_walk_cache(AP_NOTE_DIRECTORY_WALK, r);
prep_walk_cache  1168 server/request.c     cache = prep_walk_cache(AP_NOTE_LOCATION_WALK, r);
prep_walk_cache  1320 server/request.c     cache = prep_walk_cache(AP_NOTE_FILE_WALK, r);