Add md.c3heaven.de to grabriel

host_vars/gabriel.c3heaven.de

@@ -4,6 +4,7 @@ acmetool_cert_domains:
  - gabriel.c3heaven.de
  - c3heaven.de
  - lists.c3heaven.de
+ - md.c3heaven.de
  - sso.c3heaven.de
  - wiki.c3heaven.de