opendkim: Fix missing dir and incorrect path

Signed-off-by: Florian Pritz <bluewind@xinu.at>

roles/opendkim/tasks/main.yml

@@ -13,8 +13,10 @@
   notify:
     - restart opendkim
 
+- file: path="/etc/opendkim/private" state=directory owner=root group=root mode=0700
+
 - name: generate DKIM key for {{dkim_selector}}
-  command: opendkim-genkey -r -s {{dkim_selector}} -d archlinux.org --bits=4096 creates=/etc/opendkim/private/{{dkim_selector}}
+  command: opendkim-genkey -r -s {{dkim_selector}} -d archlinux.org --bits=4096 creates=/etc/opendkim/private/{{dkim_selector}}.private
 
 - name: start and enable opendkim
   service: name=opendkim enabled=yes state=started