uniq feature request: check-fields option

[Steve Ward]

For the uniq program, these options exist:

--skip-chars=N
    avoid comparing the first N characters

--skip-fields=N
    avoid comparing the first N fields

--check-chars=N
    compare no more than N characters in lines


It would be nice to have:

--check-fields=N
    compare no more than N fields in lines



Steve