Milter-greylist

I started to test an extra feature for greylist.
Timed whitelist, to be used when testing with new users/domains, or with
that don't like the delay introduced by greylist.

During the day the messages enter without passing greylist, and at night
it passes on greylist.

I have made an .m4 file which I use in my rpm file to configure
milter-greylist, this m4 file now also has the rules to check for
whitelisted entries on access.d, and permit also to specify whitelist
with time.

The format are like :

greylist:1.2.3.4 WHITE
greylist:1.2.3.5 WHITE:0700:1800
greylist:domain.com WHITE:0700:1800

To use this feature a patch must be applied to check for variable
{greylist} defined in sendmail rules.
The files need to test this feature are :


http://www.saisp.br/ifm/patches/milter-greylist.c.patch
http://www.saisp.br/ifm/patches/milter-greylist.m4

I appreciate any feedback about this feature.