Bug#776180: live-build: Security and updates disabled by default in Jessie

[jnqnfe <jnqnfe@gmail.com>]

Package: live-build
Version: 4.0.4-1
Severity: Important
Tags: security patch

Security and update mirror sources are not included in apt source
configurations by default if the user specifies jessie as the target
distribution.

These were set to false by default for Jessie back in an alpha build of
v3.x, and presumably should have been changed in v4.x.

Patch attached based on v5.x.

commit 4707b8e32a721e1769ddba8937c0da872d6c8f69
Author: jnqnfe <jnqnfe@gmail.com>
Date:   Sun Jan 25 03:51:45 2015 +0000

    Update distribution defaults

diff --git a/functions/defaults.sh b/functions/defaults.sh
index ffec3b5..8b09191 100755
--- a/functions/defaults.sh
+++ b/functions/defaults.sh
@@ -629,7 +629,7 @@ Set_defaults ()
 
 	# Setting security updates option
 	case "${LB_PARENT_DISTRIBUTION}" in
-		jessie|sid)
+		stretch|sid)
 			LB_SECURITY="${LB_SECURITY:-false}"
 			;;
 
@@ -640,7 +640,7 @@ Set_defaults ()
 
 	# Setting updates updates option
 	case "${LB_PARENT_DISTRIBUTION}" in
-		jessie|sid)
+		stretch|sid)
 			LB_UPDATES="${LB_UPDATES:-false}"
 			;;