Document an API difference

[Shachar Shemesh]

Hi list,

I'm documenting a probable API result difference between Wine and 
Windows. At the moment, this is no longer a problem as far as I'm 
concerned, so there is no point for me to write regression tests and fix 
it, but this may be stopping someone else.

It seems that if you call "select" with a FD set that holds the same 
file descriptor more than once, Wine's and Window's responses are 
different. Under windows, you get a statement saying that only one FD is 
active. Under Wine, you get as many as the number of times the repeating 
FD is in the set.

Like I said, this does not affect, as far as I know, any program, so I'm 
not sure we need to fix it. I just wanted the list's archive to have a 
mention of this issue.

Shachar