data compression enhancements
data compression enhancements

Minor changes to the hash function (pattern maching using a LUT). Normal
mode ("enc_lz") gets a ~1% size reduction when compressing the Silesia
compression corpus (high compression mode ("enc_lzh") has no significative
gain nor regression).

faragon/libsrt,faragon/libsrt,faragon/libsrt,faragon/libsrt