Provide apt sources.list file to support 'bullseye' as Debian suite

Requires new security.debian.org repository layout quoting from
https://lists.debian.org/debian-devel-announce/2019/07/msg00004.html:

| over the last years we had people getting confused over <suite>-updates
| (recommended updates) and <suite>/updates (security updates).  Starting
| with Debian 11 "bullseye" we have therefore renamed the suite including
| the security updates to <suite>-security.
|
| An entry in sources.list should look like
|
|   deb http://security.debian.org/debian-security bullseye-security main
|
| For previous releases the name will not change.

diff --git a/etc/grml/fai/config/files/etc/apt/sources.list.d/debian.list/DEBIAN_BULLSEYE b/etc/grml/fai/config/files/etc/apt/sources.list.d/debian.list/DEBIAN_BULLSEYE
new file mode 100644 (file)
index 0000000..54eb57f
--- /dev/null
+++ b/etc/grml/fai/config/files/etc/apt/sources.list.d/debian.list/DEBIAN_BULLSEYE
@@ -0,0 +1,7 @@
+# official debian repository:
+  deb     http://ftp.debian.org/debian/ bullseye main contrib non-free
+  deb-src http://ftp.debian.org/debian/ bullseye main contrib non-free
+
+# security updates:
+  deb     http://security.debian.org/debian-security bullseye-security main contrib non-free
+  deb-src http://security.debian.org/debian-security bullseye-security main contrib non-free