DEBIAN_STABLE: use buster-backports instead of stretch-backports

Debian/buster is the current stable release, there's no point in
enabling stretch-backports there.

FTR: we could set it to 'stable-backports' instead, though then
apt/apt-get/... will complain about it:

| W: Conflicting distribution: http://ftp.debian.org/debian stable-backports InRelease (expected stable-backports but got buster-backports)

diff --git a/etc/grml/fai/config/files/etc/apt/sources.list.d/debian.list/DEBIAN_STABLE b/etc/grml/fai/config/files/etc/apt/sources.list.d/debian.list/DEBIAN_STABLE
index 3072559..2e0674e 100644 (file)
--- a/etc/grml/fai/config/files/etc/apt/sources.list.d/debian.list/DEBIAN_STABLE
+++ b/etc/grml/fai/config/files/etc/apt/sources.list.d/debian.list/DEBIAN_STABLE
@@ -7,5 +7,5 @@
   deb-src http://security.debian.org/ stable/updates main contrib
 
 # backports:
-  deb     http://ftp.debian.org/debian/ stretch-backports main contrib non-free
-  deb-src http://ftp.debian.org/debian/ stretch-backports main contrib non-free
+  deb     http://ftp.debian.org/debian/ buster-backports main contrib non-free
+  deb-src http://ftp.debian.org/debian/ buster-backports main contrib non-free