Use All Available Space in the Hash Table to Extent Chain Table Reach
Use All Available Space in the Hash Table to Extent Chain Table Reach

Rather than restrict our temp chain table to 2 ** chainLog entries, this
commit uses all available space to reach further back to gather longer
chains to pack into the DDSS chain table.

Cyan4973/zstd,Cyan4973/zstd,Cyan4973/zstd,Cyan4973/zstd,Cyan4973/zstd