add more info about how the backend works...

This should make it much easier for people to run their own version
if they'd like to..

README.md

@@ -55,3 +55,30 @@ downloaded.  Another index is also maintained which only contains the
 currently available to d/l snapshots.  This may contain snapshots that
 no longer exist, as it is only updated/checked when a new snapshot is
 released.
+
+The procmail rc lines that I use:
+```
+:0c
+* Delivered-To: (freebsd-)?announce@([^@\.]*\.)*freebsd.org
+| $HOME/bin/snapwrap.sh
+
+:0
+* Delivered-To: (freebsd-)?snapshots@([^@\.]*\.)*freebsd.org
+{
+:0c
+ml/snapshots
+
+:0
+| $HOME/bin/snapwrap.sh
+
+}
+```
+
+The first rule is used for RELEASE announcements.  They are copied (`c`)
+so that a later rule can file them in the proper mailbox.  The second rule
+is for the snapshots, and smiilarly organized, but the mailbox filing
+happens here.
+
+The snapwrap.sh script is included in the repo, but the command to deploy
+the database to the FreeBSD.org servers has been deleted, but it is a
+simple: `tar -cf - <files> | ssh freefall tar -xf -` type command.

snapwrap.sh

@@ -0,0 +1,11 @@
+#!/bin/sh
+
+set -e
+
+cd ~jmg/public_html/FreeBSD-snap
+
+tmpfile="$(mktemp snapmail.XXXXXXX)"
+
+cat > "$tmpfile"
+
+sh addinfo.sh "$tmpfile" && rm "$tmpfile"