HTCONDOR-2637 Request old DN formatting for certificate issuer

The openssl formats DNs differently in EL7, EL8, and EL9. Request the old
format explicitly so that we know how to parse it.

src/condor_ce_host_network_check

@@ -401,7 +401,7 @@ def main():
     # If the host cert is missing or unreadable, emit a warning but keep going.
     hostcert = htcondor.param.get("GSI_DAEMON_CERT", "/etc/grid-security/hostcert.pem")
     if os.access(hostcert, os.R_OK):
-        fd = os.popen("openssl x509 -in %s -noout -subject" % hostcert)
+        fd = os.popen("openssl x509 -in %s -noout -subject -nameopt compat" % hostcert)
         dn = fd.read().strip()
         if fd.close() or not dn:
             print(f"WARNING: OpenSSL unable to parse host certificate {hostcert}; GSI configuration will likely fail.", file=sys.stderr)