Milter-greylist

> 
> From the man page of poll on Linux:
> 
> NOTES
>        Some implementations define the non-standard constant INFTIM with the value -1 for use as a timeout.  This con-
>        stant is not provided in glibc.
> 

This is just a side note. The name INFTIM is very selfish.
It declares himself in a global context. There might be other time related calls,
where the "infinite time" has different value.
Therefore it would be more appropriate if the name of that constant would be
POLLINFTIM instead of INFTIM, like other standard names do: POLLIN, POLLPRI,
POLLHUP, etc...