CI: test OpenBSD + FreeBSD in Linux VM

.github/workflows/bsd.yml

@@ -0,0 +1,56 @@
+name: bsd
+on: [push, pull_request]
+permissions:
+  # BOLD WARNING: do not add permissions, this workflow executes remote code
+  contents: read
+env:
+  FORCE_COLOR: 1
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+jobs:
+  freebsd:
+    name: freebsd
+    timeout-minutes: 20
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+    steps:
+      - uses: actions/checkout@v4
+      - uses: vmactions/freebsd-vm@v1
+        with:
+          prepare: pkg install -y nginx python311 py311-pip py311-tox
+          usesh: true
+          copyback: false
+          # not a typo: "openssl --version" != "openssl version"
+          run: |
+            uname -a \
+            && python3.11 --version \
+            && python3.11 -m tox --version \
+            && openssl version \
+            && pkg info nginx \
+            && python3.11 -m tox -e run-module \
+            && python3.11 -m tox -e run-entrypoint \
+            && python3.11 -m tox -e py
+  openbsd:
+    name: openbsd
+    timeout-minutes: 20
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+    steps:
+      - uses: actions/checkout@v4
+      - uses: vmactions/openbsd-vm@v1
+        with:
+          prepare: pkg_add python py3-pip py3-tox nginx
+          usesh: true
+          copyback: false
+          run: |
+            uname -a \
+            && python3 --version \
+            && python3 -m tox --version \
+            && openssl version \
+            && pkg_info nginx \
+            && python3 -m tox -e run-module \
+            && python3 -m tox -e run-entrypoint \
+            && python3 -m tox -e py