Use different variables for echo command for notes and errors,
$ECHO_NOTE and $ECHO_ERROR instead of just $ECHO as before,
but use the same defaults.
If file $UPSTART_JOB_CONF (here /etc/upstart-job.conf) exists,
source it so the variables can be overridden if desired.

--- upstart-0.6.5.orig/debian/upstart-job
+++ upstart-0.6.5/debian/upstart-job
@@ -5,6 +5,8 @@
 
 set -e
 
+UPSTART_JOB_CONF="/etc/upstart-job.conf"
+
 INITSCRIPT="$(basename "$0")"
 JOB="${INITSCRIPT%.sh}"
 
@@ -27,27 +29,32 @@
 COMMAND="$1"
 shift
 
-
 if [ -z "$DPKG_MAINTSCRIPT_PACKAGE" ]; then
-	ECHO=echo
+	ECHO_NOTE=echo
+	ECHO_ERROR=echo
 else
-	ECHO=:
+	ECHO_NOTE=:
+	ECHO_ERROR=:
+fi
+
+if [ -e "$UPSTART_JOB_CONF" ]; then
+	. "$UPSTART_JOB_CONF"
 fi
 
-$ECHO "Rather than invoking init scripts through /etc/init.d, use the service(8)"
-$ECHO "utility, e.g. service $INITSCRIPT $COMMAND"
+$ECHO_NOTE "Rather than invoking init scripts through /etc/init.d, use the service(8)"
+$ECHO_NOTE "utility, e.g. service $INITSCRIPT $COMMAND"
 
 case $COMMAND in
 status)
-    $ECHO
-    $ECHO "Since the script you are attempting to invoke has been converted to an"
-    $ECHO "Upstart job, you may also use the $COMMAND(8) utility, e.g. $COMMAND $JOB"
+    $ECHO_NOTE
+    $ECHO_NOTE "Since the script you are attempting to invoke has been converted to an"
+    $ECHO_NOTE "Upstart job, you may also use the $COMMAND(8) utility, e.g. $COMMAND $JOB"
     $COMMAND "$JOB"
     ;;
 start|stop|restart)
-    $ECHO
-    $ECHO "Since the script you are attempting to invoke has been converted to an"
-    $ECHO "Upstart job, you may also use the $COMMAND(8) utility, e.g. $COMMAND $JOB"
+    $ECHO_NOTE
+    $ECHO_NOTE "Since the script you are attempting to invoke has been converted to an"
+    $ECHO_NOTE "Upstart job, you may also use the $COMMAND(8) utility, e.g. $COMMAND $JOB"
     PID=$(status "$JOB" 2>/dev/null | awk '/[0-9]$/ { print $NF }')
     if [ -z "$PID" ] && [ "$COMMAND" = "stop" ]; then
         exit 0
@@ -60,14 +67,14 @@
     $COMMAND "$JOB"
     ;;
 reload|force-reload)
-    $ECHO
-    $ECHO "Since the script you are attempting to invoke has been converted to an"
-    $ECHO "Upstart job, you may also use the $COMMAND(8) utility, e.g. $COMMAND $JOB"
+    $ECHO_NOTE
+    $ECHO_NOTE "Since the script you are attempting to invoke has been converted to an"
+    $ECHO_NOTE "Upstart job, you may also use the reload(8) utility, e.g. reload $JOB"
     reload "$JOB"
     ;;
 *)
-    $ECHO
-    $ECHO "The script you are attempting to invoke has been converted to an Upstart" 1>&2
-    $ECHO "job, but $COMMAND is not supported for Upstart jobs." 1>&2
+    $ECHO_ERROR
+    $ECHO_ERROR "The script you are attempting to invoke has been converted to an Upstart" 1>&2
+    $ECHO_ERROR "job, but $COMMAND is not supported for Upstart jobs." 1>&2
     exit 1
 esac