From: Marc Haber <mh+debian-bugs@zugschlus.de>

--- cron-apt.orig	2004-12-04 12:44:18.000000000 +0100
+++ cron-apt	2004-12-04 12:46:35.000000000 +0100
@@ -83,10 +83,11 @@
 ############################# arguments #######################################
 
 STDOUT=""
+ALLCONFIGS=""
 
 while [ -n "$*" ] ; do
     if [ "$1" = "--help" ] ; then
-	echo "USAGE: cron-apt [-i] [-s] [configfile]"
+	echo "USAGE: cron-apt [-i] [-s] [configfiles]"
 	exit 0
     elif [ "$1" = "-i" ] ; then
 	RUNIMMEDIATELY="yes"
@@ -97,11 +98,13 @@
 	shift
     else
 	CONFIG="$1"
+    	ALLCONFIGS="$ALLCONFIGS $CONFIG"
 	shift
     fi
 done
 if [ -z "$CONFIG" ] ; then
     CONFIG=/etc/cron-apt/config
+    ALLCONFIGS="$CONFIG"
 fi
 
 ############################## lib and tmp dirs ###############################
@@ -166,11 +169,13 @@
 export LC_ALL="C"
 
 # Read configuration.
-if [ -f "$CONFIG" ] ; then
-    . "$CONFIG"
-else
-    echo "The config file $CONFIG does not exist, using defaults."
-fi
+for cfg in $ALLCONFIGS; do
+  if [ -f "$cfg" ] ; then
+    . "$cfg"
+  else
+    echo >&2 "The config file $cfg does not exist."
+  fi
+done
 
 if [ -t 0 ]; then
     RUNIMMEDIATELY="yes"