uniq: missing option -W / --check-fields=N

[Matt Keenan]

Greetings all,

uniq(1) used to have an option for checking only a certain number of 
fields. I have since noticed that some scripts I wrote some time ago 
have stopped working because the -W / --check-fields=N option has 
disappeared. Can it please be put back in? I am happy to write a patch 
to do so if no-one else wants to do it. Is there a reason why it 
disappeared?

Matt