| private static final int[] RNUMS The Bzip2 specification originally included the optional addition of a slight pseudo-random
perturbation to the input data, in order to work around the block sorting algorithm's non-
optimal performance on some types of input. The current mainline bzip2 does not require this
and will not create randomised blocks, but compatibility is still required for old data (and
third party compressors that haven't caught up). When decompressing a randomised block, for
each value N in this array, a 1 will be XOR'd onto the output of the Burrows-Wheeler
transform stage after N bytes, then the next N taken from the following entry.
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