private static void reindexDatabase() {
        init();
        try {
            Log.d("Database clean: recreate indices");
            database.execSQL("REINDEX");
        } catch (final Exception e) {
            Log.w("DataStore.clean", e);
        }
    }
Remove obsolete cache directories in c:geo private storage.
Also removes caches marked as "to be deleted" immediately (ignoring 72h grace period!)
main/src/main/java/cgeo/geocaching/storage/DataStore.java