Add OpenBSD support to GitHub Actions workflow

Author: toddr

.github/workflows/testsuite.yml

@@ -58,6 +58,7 @@ jobs:
           - debian:bullseye     # OpenSSL 1.1.1
           - debian:bookworm     # OpenSSL 3.0.x
           - almalinux:9         # OpenSSL with new crypto policies (RHEL-compatible)
+          - genericbsd/openbsd:7.3  # OpenBSD (specific version, publicly available)
 
     container: ${{ matrix.os-version }}
     steps:
@@ -66,7 +67,8 @@ jobs:
         run: |
           (apt-get update &&
           apt-get install -y openssl perl make gcc libssl-dev sudo curl) ||
-          (yum install --skip-broken -y openssl perl make gcc openssl-devel sudo curl)
+          (yum install --skip-broken -y openssl perl make gcc openssl-devel sudo curl) ||
+          (pkg_add openssl perl make gcc curl)
       - run: openssl version
       - run: perl -V
       - name: uses install-with-cpm