github actions: use archive.debian.org for old debian versions

Additionally add workflow_dispatch

.github/workflows/test.yml

@@ -7,6 +7,7 @@ on:
       - '*appveyor*'
       - '*doozer*'
   pull_request:
+  workflow_dispatch:
 
 jobs:
   test:
@@ -66,9 +67,21 @@ jobs:
           - perlimage: 5.16.3-buster
           - perlimage: 5.18.4-buster
           - perlimage: 5.22.4-stretch
+          - perlimage: 5.36.0-bullseye
 
     steps:
     - uses: actions/checkout@v3
+    - name: apt hacks
+      run: |
+        set -e
+        CODENAME=$(perl -nle '/^VERSION_CODENAME="?([^"]+)/ and $codename=$1; /^VERSION="\d+ \((.*)\)/ and $maybe_codename=$1; END { print $codename || $maybe_codename }' /etc/os-release)
+        case "$CODENAME" in
+          wheezy|jessie|stretch)
+            echo "APT::Get::AllowUnauthenticated 1;" > /etc/apt/apt.conf.d/02allow-unsigned
+            echo "deb [check-valid-until=no] http://archive.debian.org/debian $CODENAME main"                   >  /etc/apt/sources.list
+            echo "deb [check-valid-until=no] http://archive.debian.org/debian-security/ $CODENAME/updates main" >> /etc/apt/sources.list
+            ;;
+        esac
     - name: "build and test"
       run: |
         apt-get update -qq && apt-get install -qq --no-install-recommends cpanminus xvfb libx11-dev libfreetype6-dev libxft-dev libpng-dev libz-dev libjpeg-dev twm