More definitions

inventory/group_vars/all

@@ -105,8 +105,12 @@ sudo: false
 # This should be set for cloud instances in their host or group vars.
 root_auth_users: ''
 
-# default resolvconf to nothing. 
+# default these all to nothing. 
 resolvconf: ''
+host_group: ''
+sshd_config: ''
+postfix_maincf: ''
+postfix_mastercf: ''
 
 # This vars get shoved into /etc/system_identification by the base role.
 # Groups and individual hosts should override them with specific info.