[WIP] compress/decompress.go::Match modified

[AskAlexSharov]

@racytech just merged method DisableFsync for tests

[racytech]

When you say requestKey which is after latest key in file does it mean that I have to open reader and a writer at the same time or what does it mean? and for suffixes do I have to read entire word from file and compare it to given suffix?

[AskAlexSharov]

I mean:

• file with keys {a, b, c}, search for key “f”. This test-case usually trigger edge-cases, like “forgotten -1” or “out of bound array read”, etc…

About suffixes: i didn’t mean any specific functionality (no new features). just “negative test-case”: search for “non existing key” and “search for existing suffix” may trigger different bugs - especially in method which does “partial key comparison”.

[AskAlexSharov]

FYI: i created similar feature request - https://github.com/ledgerwatch/erigon-lib/issues/1053

[racytech]

Will create a new PR, since this one isn't right