Milter-greylist

1) Do greylist.conf's parametets accept "s" (for seconds) and "w"
(for weeks) suffixes as well as in command-line?
If yes, I believe they should be mentioned in greylist.conf(5).

And several features which we are missing of.

2) Have you ever thought about such feature as limiting resources
taken by milter-greylist for keeping tuples?  It would be nice to
have one, for example, a simple limit of the number of tuples which
can be hold in memory (if the limit reaches milter-greylist should
optionally remove the oldest tuples or just approve connections).

3) Supporting DB4 for getting the actual whitelist is very much
needed (it's already in TODO list, I know).

4) Dumping database on exit whould be great too.  Problems are very
rare and the database is very big, so we dump it once in two hours.
It is sad to lose records during, say, system reboots.

With the best regards,
Denis Solovyov