Use regexp to check for $dist/updates vs $dist-security

If the security repo will be  enabled or not currently depends on the
host's sources.list. So the resulting files differ depending on the
host where the test is run. Add a TODO item to break with that
"feature".

Also mention in the TODO list that a repo on archive.debian.org should
be used instead security.debian.org if the release is EoL. Currently
the security mirror is hardcoded into the hook.

t/data/sources.list.bookworm

@@ -1,16 +0,0 @@
-#
-#  /etc/apt/sources.list
-#
-
-
-#
-# bookworm
-#
-deb     http://deb.debian.org/debian     bookworm main contrib non-free
-deb-src http://deb.debian.org/debian     bookworm main contrib non-free
-
-#
-# Security updates
-#
-deb     http://security.debian.org/ bookworm-security  main contrib non-free
-deb-src http://security.debian.org/ bookworm-security  main contrib non-free

t/data/sources.list.bullseye

@@ -1,16 +0,0 @@
-#
-#  /etc/apt/sources.list
-#
-
-
-#
-# bullseye
-#
-deb     http://deb.debian.org/debian     bullseye main contrib non-free
-deb-src http://deb.debian.org/debian     bullseye main contrib non-free
-
-#
-# Security updates
-#
-deb     http://security.debian.org/ bullseye-security  main contrib non-free
-deb-src http://security.debian.org/ bullseye-security  main contrib non-free

t/data/sources.list.buster

@@ -1,16 +0,0 @@
-#
-#  /etc/apt/sources.list
-#
-
-
-#
-# buster
-#
-deb     http://deb.debian.org/debian     buster main contrib non-free
-deb-src http://deb.debian.org/debian     buster main contrib non-free
-
-#
-# Security updates
-#
-deb     http://security.debian.org/ buster/updates  main contrib non-free
-deb-src http://security.debian.org/ buster/updates  main contrib non-free

t/data/sources.list.sid

@@ -1,16 +0,0 @@
-#
-#  /etc/apt/sources.list
-#
-
-
-#
-# sid
-#
-deb     http://deb.debian.org/debian     sid main contrib non-free
-deb-src http://deb.debian.org/debian     sid main contrib non-free
-
-#
-# Security updates - Uncomment to enable.
-#
-# deb     http://security.debian.org/ sid-security  main contrib non-free
-# deb-src http://security.debian.org/ sid-security  main contrib non-free

t/data/sources.list.stretch

@@ -1,16 +0,0 @@
-#
-#  /etc/apt/sources.list
-#
-
-
-#
-# stretch
-#
-deb     http://deb.debian.org/debian     stretch main contrib non-free
-deb-src http://deb.debian.org/debian     stretch main contrib non-free
-
-#
-# Security updates
-#
-deb     http://security.debian.org/ stretch/updates  main contrib non-free
-deb-src http://security.debian.org/ stretch/updates  main contrib non-free