opendkim: Fix permissions of socket

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

roles/opendkim/tasks/main.yml

@@ -8,7 +8,7 @@
   notify:
     - restart opendkim
 
-- file: path="/var/spool/opendkim/" state=directory owner=opendkim group=mail mode=750
+- file: path="/var/spool/opendkim/" state=directory owner=opendkim group=postfix mode=750
 
 - name: install domains config
   template: src=domains.j2 dest=/etc/opendkim/domains owner=root group=root mode=644

roles/opendkim/templates/opendkim.conf.j2

@@ -7,5 +7,5 @@ Socket                  local:/var/spool/opendkim/opendkim
 Syslog                  Yes
 SyslogSuccess           Yes
 UMask                   007
-UserID                   opendkim
+UserID                   opendkim:postfix