Milter-greylist

The new patch seems to be fine on my server.  I made an adjustment
to conf.h and added some more description to the README.

Thanks,
Romain

--- conf.h-	Wed Nov 30 16:03:12 2005
+++ conf.h	Wed Nov 30 16:17:55 2005
@@ -54,5 +54,5 @@
 
 #ifndef DRACDB
-#define DRACDB "/usr/local/etc/dracdb.db"
+#define DRACDB "/usr/local/etc/dracd.db"
 #endif
 
--- README-	Wed Nov 30 16:03:12 2005
+++ README	Wed Nov 30 16:27:06 2005
@@ -274,4 +274,15 @@
  ============
 
+
+Briefly, Dynamic Relay Authorization Control provides "POP/IMAP
+before SMTP" authorization.  If an IP address has recently been a
+client of some POP or IMAP server affiliated with the SMTP server,
+the address is considered to be a legitimate user when submitting
+email via SMTP.  Enabling DRAC support effectively whitelists the
+address for some period following the most recent read operation,
+typically for 30 minutes until the DRAC daemon revokes its
+authorization.  More information is available from the DRAC website,
+<http://mail.cc.umanitoba.ca/drac/>.
+
 milter-greylist can be built with DRAC support, by giving the
 --enable-drac flag to configure. Location of the DRAC DB file can